Soundsgoodtome
Headphoneus Supremus
Hmm. I have found that the M80 are a bit tight for me after a while. I don't know if it's just being spoiled by the DT-990, but even the UE6000 get a bit uncomfortable after a while now. I thought the UE6000 would be my last portable for a while (M80s were a no-brainer for $30 from the Shack), but I've become less impressed by them over time, in part due to their bulk and how low they play without the ANC. Think I've ruled out the DT1350 due to my long hair and the price difference, so really it's just a question of if the Amperior will get me the balance of comfort, performance, and portability that I'm trying to strike.
if you're worried about comfort, get a box wider than your head by an inch or two and leave headphones on it like a stand when you're not using it. Over time it'll stretch the headband and should have less clamp.