Yea, I can be sensitive to the clamping. I tried on my roommates Beats Pro, and the clamping pressure on those things made me feel like I was in a headlock.
Anyway, I've been using my 880s with my Nuforce uDAC2 though USB on my computer all morning. These things make me want to listen to my entire music collection again! Loving these, if I hadn't already mentioned it.