Along with the summary below, I have a review thread comparing the TMA-1 Studio with the Sony MDR-1R, Z1000, Sennheiser Momentum, Logitech UE 6000 and Audio Technica M50 here:
 
http://www.head-fi.org/t/639948/review-closed-portable-circumaural-around-ear-headphone-comparison-m50-z1000-tma-1-s-momentum-ue6000-mdr-1r
 
I also posted the following Youtube review of the TMA-1. If you like the video check out my channel for more reviews
 

 
Summary
 
BUILD
 
The TMA-1 look incredible. However there are a number of huge flaws. With the included foam earpads, the foam tends to peel away from the attachment disk (see the video). I was sent a replacement pair of pads by AIAIAI support (they were very good about it) which supposedly use a stronger glue, but after a while I encountered the same issues. I ended up using liquid nails glue to secure the foam earpads, which I prefer in sound and comfort. The TMA-1 has a very low clamping force which makes it very comfortable; however with the included coiled cable they end up pulling to the side because the coiled cable is heavy and the TMA-1 is not secure on the head. I ordered a straight cable and recommend it strongly over the stock coiled cable.
 
SOUND
 
The TMA-1 have a punchy dynamic sound, with rolled off highs but a slightly metallic treble that makes the entire headphone sound exciting, though extremely coloured. Despite the intimidating design however, sub-bass is actually quite poor and below 100hz notes get a little flabby and loose. They have a wide soundstage but don't sound particularly defined. They do however sound fun with some modern studio recordings. Despite the name I would never ever use this for studio monitoring.
 
OVERALL
 
The TMA-1 has some really critical design flaws despite being an absolutely gorgeous headphone. If they had a truly authoritative sound to match the design, these flaws could be forgiven. As it stands there are some real flaws that make this a bit of a non-recommendation for me.

Along with the summary below, I have a review thread comparing the Sony 7550, EX1000, XBA-4 and XBA-40 here:
http://www.head-fi.org/t/608553/review-comparison-two-flagships-pass-in-the-night-sony-xba-4-review-vs-the-mdr-ex1000-updated-with-7550-and-xba-40
 
I also have a comparison review on youtube of the 7550 vs EX1000. If you like the video check out my channel for more reviews
 

 
Note: In the review I state that the EX1000 is made in Thailand, this is incorrect. It is made in Japan.
 
Summary
 
BUILD
 
The 7550 has a nice build, though it is plastic compared to the EX1000's magnesium alloy. The unusual ear hanger design is very comfortable but offers very little environmental isolation and cause a great deal of wind noise, making these somewhat awkwardly positioned as a portable earphone with restricted portable applications. However for home and studio use they are excellent, especially as the longer cable makes connection to an amplifier a little less awkward.
 
SOUND
 
The 7550 has a warmish sound with deeply extended bass and articulate mids. They also have a wide sound-stage thanks to the unusual design and low isolation. Compared to the EX1000 the 7550 has a tamed treble section, meaning that they do not quite have the EX1000's tremendous sense of space and sparkle. They sound more intimate than the EX1000 because of the subdued treble. They still sound very articulate and still have traces of the characteristic grain of the EX1000's treble; however it is never a nuisance. They are balanced and sound great with a wide variety of music.
 
OVERALL
 
I think of the 7550 as the everyman's EX1000, and this is no slight against them. They are more flexible in terms of genre bandwidth, better value, and I really like the longer cable. They might lack the magic of the EX1000 at its best but overall I consider them easier to live with. Compared to their closest competitor, the VSonic GR07, the 7550 offers a wider soundstage and a slightly drier sound, but have a very similar level of performance. The GR07 is much more practical in terms of isolation and fit.

Along with the summary below, I have a review thread comparing the Sony EX1000, 7550, XBA-4 and XBA-40 here:
http://www.head-fi.org/t/608553/review-comparison-two-flagships-pass-in-the-night-sony-xba-4-review-vs-the-mdr-ex1000-updated-with-7550-and-xba-40
 
I also have a comparison review on youtube of the EX1000 vs the 7550. If you like the video check out my channel for more reviews
 

 
Note: In the review I state that the EX1000 is made in Thailand, this is incorrect. It is made in Japan.
 
Summary
 
BUILD
 
The EX1000's have incredible build quality and feel like jewellery in your hand thanks to the premium magnesium alloy bodies. The unusual ear hanger design is very comfortable but offers very little environmental isolation and cause a great deal of wind noise, making these somewhat awkwardly positioned as a portable earphone with restricted portable applications.
 
SOUND
 
The EX1000 has a beautiful, emotive and slightly dry sound with deeply extended bass and articulate mids. They also have a tremendously wide sound-stage thanks to the unusual design and low isolation. They have peaks in the treble which make female vocals sound magical, but on modern studio recordings they can sound harsh and grainy at times. They do best with classical or mellow acoustic music in my experience.
 
OVERALL
 
The EX1000 is unmistakably a flagship earphone for Sony, but has a number of quirks. If you are looking for a flagship dynamic driver this is definitely one of the best options, though personally I prefer the 7550 for a wider variety of music.

Along with the summary below, I have made a review thread comparing the Sony MDR-1R with the Sennhesier Momentum, MDR-Z1000, Logitech UE 6000, Audio Technica ATH-M50 and AIAIAI TMA-1 here:
http://www.head-fi.org/t/639948/review-closed-portable-circumaural-around-ear-headphone-comparison-m50-z1000-tma-1-s-momentum-ue6000-mdr-1r
 
I also made a Youtube review if you would like to get a better look and brief review of the MDR-1R's. Please check out my channel for more reviews!
 

 
A Short Summary
 
BUILD
 
The MDR-1R has a sensible and attractive build but there are a few issues. Firstly my pair has the jack rattle issue as reported by other users. The headphone jack does not have a locking mechanism like many other headphones with detachable cables at this price. The synthetic pads aren't the most breathable in hot weather. Overall the build quality is nice but not anything super special, unlike the premium feeling Z1000 and certainly nothing like older Sony flagships. The MDR-1R folds flat but is still relatively bulky on account of the large earcups, thick headband and thick earpads.
 
SOUND
 
The MDR-1R has a clear and pleasant tuning, with a particular focus on mids that makes female vocals sound very nice. Overall the sound is slightly thick but still with a liquid clarity to most notes. Bass is still a little flabby despite Sony's efforts to improve the performance; on the very lowest notes (less than 100hz) it still lacks authority and rumble. They have a relaxed and natural soundstage thanks to the large cups and angled drivers. They are flexible with genres but sound best with indie / acoustic music in my experience.
 
OVERALL
 
At the revised retail price of $199 USD the MDR-1R's are pretty good. They have a few flaws that don't illicit the same kind of flagship magic as previous Sony cans, but the sonic performance is definitely an improvement on the Z1000. I would look forward to a MDR-1R successor with better build quality.

Along with the summary below, I have made a review thread comparing the Momentum with the Sony MDR-1R, MDR-Z1000, Logitech UE 6000, Audio Technica ATH-M50 and AIAIAI TMA-1 here:
http://www.head-fi.org/t/639948/review-closed-portable-circumaural-around-ear-headphone-comparison-m50-z1000-tma-1-s-momentum-ue6000-mdr-1r
 
I also made a Youtube review if you would like to get a better look and brief review of the Momentums. Please check out my channel for more reviews!
 

 
A Short Summary
 
BUILD
 
The Momentum is a well-built portable with a super lightweight and comfortable design provided that your ears are not too large for the earcups. For me, parts of the pads sit on top of my ears, but because the leather is so supple and breathable this is not a huge issue outside of hot weather. The detachable mic cable with variable angle mic-plug is really clever, but unfortunately the non-mic cable does not come with this plug. Also on the earcup side the detachable cable is a 2.5mm jack with a very narrow space for insertion which makes aftermarket replacement a little more difficult. My biggest gripe is that they do not fold up into a more compact shape.
 
SOUND
 
The Momentum's have a dark, rich sound with very fast, tight and deep bass. Mids are also very clear with a glossy bell tone clarity. Treble is definitely relaxed - there is a slight peak to lend the sound some sparkle / shimmer, but overall it definitely takes a backseat in the signature without sounding veiled like, say, the B&W P5. The soundstage is clean, with good definition of where instruments are. However with the treble roll-off the soundstage is inevitably quite intimate. The Momentum is quite versatile with genres but does especially well with modern studio recordings.
 
Conclusion
 
The Momentums are fairly expensive but offer a portable package with some of the lease compromises I've seen. Really excellent sound (provided you like darker signatures) and a good build. I've owned them for almost a year now and I love them!