Thought I'd pop in to show the M-80/V-80 some love.
I was searching for a portable, easily-driven, on-ear set to carry around with me on weekend trips, afternoons at the library, mornings at the coffee shop, etc. I ended up buying both the Edition 8 and V-80 to compare. After living with both of them for about a month, the Edition 8 has been sold and the V-80 is here to stay. Even without considering price, I find the sound of the V-80 much easier to live with.
This has been my go-to recommendation for anyone looking for a portable headphone with a versatile sound signature. It's very smooth, lush, and non-fatiguing -- which works with almost everything that you can throw at it. I see a lot of people complain about the recessed treble -- but that's one of the qualities that makes the M-80 such a good all-arounder that plays well with many different source devices, and different source files of different mastering quality. It's not the ultimate word on resolution, but it also manages to avoid committing any major flaws (which says a lot).
Cannot wait to see what Val and company do with the M-100.