This one or a cheaper version with external PSU/battery supply. Better than your choices and many others. The amp shares the amplification circuitry with the Sonic Pearl 2 linked in my footnote (latest review).

Improved soundstage depth, less edgy trebles, more background nuances audible. Listening pleasure grows overall.

The mod for the T90's that I really like is to remove the cloth ring separating the ear from the transducer and place it behind the transducer in the ear cup. The black side should be towards the transducer and the grey foam layer should be on the ear cup's side, facing the ear cup mesh. You can...

Maybe this would help, with more info coming soon.

http://www.6moons.com/audioreviews2/noble/1.html Looks like we should read more soon...

Next generation of the Sonic Pearl soon to be reviewed completely. Introduction is promising. http://www.6moons.com/audioreviews2/earstream/1.html

Could different ear cup position explain variation in CSD graphs, especially in the time domain? http://en.goldenears.net/22602 http://en.goldenears.net/4326 Besides the measurements, the new (say above 12k serial #) HD800 sound different than those with numbers up to 5000 or more. The new...

I compared the K812 to the PS1000 directly a couple of times. Once these were similar headphones with different imaging and slightly different tonal balance - the K812 were more even. Another time the PS1000 seemed to sound drier so I decided to mod them. This made them sound closer to the Sony...

I've heard such combination and they match very well to each other. Overall, the TH900 is a bit darker headphone than the R10 with stronger bass presence.

http://www.head-fi.org/t/702554/review-sonic-pearl-amplifier-from-earstream-geusts-black-pearl-and-spl-phonitor-mk1

Well. it's all about your acceptance of sound with no damping factor applied to the transducer. You gain a couple of dB in mid-bass where the transducer resonates and no voltage control of the transducer's behavior. Some people like this kind of presentation. For instance the Beyerdynamic T1...

I agree that the Black Pearl is a good match with recabled HD650. I've heard such combination a couple of times. Another recommended model is Ultrasone Edition 12. If I had no headphones right now, I would most probably buy these just due to results I obtained with my amp connecting them...

http://www.head-fi.org/t/642742/black-pearl-headphone-amp-from-ear-stream-loaners-thoughts

I haven't tried the LCD-3 but I liked the LCD-2 with the Sonic Pearl more than anything different. This amp just opened them. Shipped to the UK there would be no duty or taxes added by customs.

I've heard such combination a couple of times with various sources. The conclusion is simple - you have to like this kind of presentation. The Bakoon pushes the Senn's towards the "ortho" kind of presentation, more juicy while less airy, especially from the current output. Either you want it, or...