...and in my opinion, the Amperiors were the superior headphone. The Amperiors isolation, comfort, and overall versatility gave me that awesome lost-in-the-music feeling, and the 100 people standing among me in the Apple store seemed to fade away. Thing is, I wish the Amperiors weren't so good, because I was so sure that the M-80's would be my perfect set of headphones.
I've been searching for the perfect portable cans for a while now, and I've held off til I have had a chance to try each in real life, and in this case, I'm glad I did. The M-80's were definitely not a bad pair of headphones, and V-moda seem to be doing awesome things in terms of headphone construction and development. But it's hard for me to like the M-80's. The minimal isolation kills my use of the headphones. I don't see exactly what environment would benefit from the use of such isolation...where would I need to have a portable hi-fi headphone that isolates poorly? And, the hexagonal/polygonal structure of the M80's are an interesting proprietary feat. but I just don't feel the comfort in this kind of headphone (I haven't tried the larger LP series of headphones, but I imagine those are more comfortable). It also seemed as if I could never get a perfect seal- though it may have been attributed in part to Radioshack's unnecessarily naggy anti-theft cable. And, I was satisfied with the sound of the M-80's but with all the external sound leaking in, I found it difficult to enjoy my music...Although, I do use primarily IEM's so I am a bit spoiled with isolation, but still, I wish isolation could've been worked in a little more.
With the Amperiors, it all just felt much more natural. I put them on, adjusted them, and was completely content. They fit well and were extremely comfortable. I noticed a tinge of brightness in the Amperiors that was not present in the M-80's and it seemed as if the Amperiors lower frequencies had more liveliness. They were substantially more expensive, however.
Anyway, I am new to the portable headphone market and this forum so I hope it's ok that I expressed my thoughts in this way. I hope I didn't offend any loyal M-80ers. These are purely my thoughts after trying 2 portable headphones that seem to be in high demand around head-fi. If you guys have any thoughts, I'd like to hear.