Review:
 
I had very high expectations before buying the Fiio EX1 AKA Dunu Titan 1. Before owning these I had the Soundmagic E10 and the Sennheiser CX 300 II Bass Enhanced. Afterwards, I bought the E80 and the GR07 as well. When I got the EX1 I immediately slipped on a pair of comply tips T-400 on the EX1 and was overwhelmed. I'm not an audiophile by any means, but I'm happy to tell you that the other reviews are very correct. These sound amazing. I was worried they would be too bass shy compared compared to my other earphones but... I was wrong. The bass hits hard and quick. There isn't much bloat compared to the CX300 II, allowing the midrange and high to be much clearer in contrast. The midrange is not veiled at all, giving vocals a clear and smooth sound. The highs are sparkly yet not fatiguing. The soundstage really excels, giving accurate imaging and a wide sense of depth. While my E10 had good imaging as well, the soundstage is much narrower. This is likely because of the ports on the Fiio EX1 which are open almost like an "open" pair of headphones.

Now, there are downsides to this implementation, and the reason I had to return these. To me, earphones are suppose to be portable and usable outside. However, due to the open design, they let in a lot of sound. Suddenly, subway rides and office use are a lot louder compared to my other pairs of earbuds. I can't even turn up the volume to my regular listening levels in the office because they leak so much sound. You'd be surprised how much sound these leak because of the open design. If you like the sound signature of these earbuds but want to use them on the go/ in office, then take a look into the Dunu Titan 1ES which is a closed version of these earbuds.
 
In terms of comfort, these are fine as long as you insert them at an angle. The metal housing is heavy and they can rest on the inner parts of your ear depending on how you insert it. While the edges are not sharp, they do feel uncomfortable after a while if they touch your ear. Don't let the comfort stop you from buying them, because they are very comfortable if you adjust the angle correctly.
 
TLDR:
 
Build Quality:
Fiio EX1 > E80 > GR07 = CX300II > the average earbuds

Bass Quantity:
CX300II > E10 > E80 > EX1 = GR07
 
Bass Quality:
GR07 > E80 = EX1 > E10 > CX300II 

Mids:
E80 > GR07 > EX1 > E10 > CX300II

Highs:
EX1 > GR07 > E80 > E10 > CX300II

Soundstage:
EX1 > GR07 = E80 > E10 > CX300II

Isolation:
E10 = CX300II = E80 =  GR07 > EX1
 
Comfort:
E80 = CX300II = E10 > GR07 = EX1

Value (in my opinion):
E80 > EX1 = GR07 > E10 > CX300II


Overall, these sound pretty darn impressive for the price. However, it was not for me since I need the sound isolation for travel and work.

Cue the Intro:
Soundmagic has created a name for themselves for budget IEM such as the E10 and the PL30s. I was one of the early adopters of the E10 and it was my first step into the quality IEM world. Unfortunately, the E10 broke after a year, and me wanting to try other IEMs, I went on to buy the sennhieser CX300 II, the Fiio ex1/Dunu Titan 1, the Vsonic GR07, and finally the Soundmagic E80.
The CX300 II were great earbuds for bloated bass that bled into the mids and highs. The Fiio EX1 were awesome sounding earbuds that lacked any isolation and was unusable in the office. While the Vsonic GR07 classics provide excellent SQ that is clearly better than the E10 and the CX300 II, it was extremely balanced, which lacked any ability to "wow" me. Enter the E80.
 
 
Build Quality:
Build quality is above average. The headphone jack is a 120 degrees ish, and seems to be quite solid. While the cable is sturdy, however, I feel like it's a bit too springy. It doesn't like to straighten up and tends to coil around by itself. It's also noticeably microphonic, but that's fixable with any wire clip. The housing seems to be metal/aluminum, so it should be able to take a decent beating. 
 
Comfort:
They are relatively comfortable, and these can be used over ear which allow you to use them while exercising. There are plenty of tips included for you to find one that fits. I prefer the included comply tips for maximum comfort. The are relatively light weight, so they don't pop out as long as there's a good seal. Unfortunately, they stick out too much to be used while sleeping. 
 
Sound Quality:
These sound very good to me. The low end reaches well into the sub-bass region, while the mid-bass gives my ears a very nice slam for electronic and EDM tracks. These are nowhere near basshead level though, however they do hit lower and harder than the GR07 and the EX1. The midrange is where these shine. They remind me of an improved version of my E10. Vocals are smooth and organic, but most of all, very natural. The mids are forward sounding, reminding me of my HD598. I would put the mids slightly ahead of the GR07 and quite a bit better than the EX1. The highs are detailed and clear, yet not sharp or piercing to my ears. The imaging is accurate and the soundstage is decent, but losing to the EX1 in terms of wideness. In terms of SQ signature, these are closer to the GR07 rather than the Fiio EX1. I prefer the E80 to my GR07. The E80s are definitely more engaging, yet does not overly present any frequency that makes it fatiguing to my ears. 
 
Value:
The soundmagic E80 can be had for around $50-70, in the same price range as the EX1 and quite a deal cheaper than the GR07. I feel that these are severely underpriced for the performance. Of course, that's not saying much since I only had a few other IEM to compare, but I don't even want to try any other IEM while having the E80. These are a significant upgrade for the E10s, while costing only $10-30 more than it's little brother. 
 
 
TLDR:
Build Quality:
Fiio EX1 > E80 > GR07 = CX300II > the average earbuds

Bass Quantity:
CX300II > E10 > E80 > EX1 = GR07
 
Bass Quality:
GR07 > E80 = EX1 > E10 > CX300II 

Mids:
E80 > GR07 > EX1 > E10 > CX300II

Highs:
EX1 > GR07 > E80 > E10 > CX300II

Soundstage:
EX1 > GR07 = E80 > E10 > CX300II

Isolation:
E10 = CX300II = E80 =  GR07 > EX1
 
Comfort 
E80 = CX300II = E10 > GR07 = EX1

Value (in my opinion):
E80 > EX1 = GR07 > E10 > CX300II

Overall, these E80s are great value for the price, and I can see why many others like them as well.

I just got these cans and I'm liking them so far. I'm not an audiophile by any means, my daily drivers are the HD598. I don't have much experience with other cans, so I can only make direct comparisons to the 598s.
 
In terms of comfort, they are both very comfortable on my head. If I had to choose, I would give the edge to the 598s. The velour padding allows my ears to breath better, while the sony pads are just a tad too small for my ears which is slightly annoying because I have to adjust them once in a while. 
 
In terms of sound quality, each headphone has their own strength and weaknesses.
The HD598s excel in soundstage (obviously because they're open) BUT the sonys are not lacking by any means. For classical or acoustic music, I can see myself reaching for the 598s 9 out of 10 times.
The Sonys excel in bass response (again pretty obvious). Many audiophiles mentioned that the bass is bloated, and they are probably right, but to my ears, these are just perfectly tuned for bass. The sonys produces wonderful but not overpowering sub-bass, with a solid hitting mid bass slam. I could see myself reaching for the sonys for most music that does not require a fast bass response. 
The mids on the HD598 are forward and slightly grainy, but sound very natural to my ears. The mids on the sonys sound just as good, however it's more laid back and smoother in signature. Both sound great here, it just depends if you are active listening or just causally listening. 
The highs are surprisingly detailed on the sonys, and even more present than the 598s. I found myself dialing down the treble frequencies on the sonys by about 2-3 db. 
 
Male vocals sound good on both, but female vocals can be slighly piercing on the sonys, again the detail is there but they are approaching the sibilant zone for me. 
 
Overall, I like both sets, and they do bring different things to the table.If I had to pick one, I would take the sonys due to their portability and better bass response.