Any comfortable Quality headphones...

i am using some sony mdr-cd180's that i bought for 20 bucks at walmart and they have a cloth closed type and are very comfortable to me, i can wear them for hours. And they sound good to boot. For 20 bucks its a great deal.

Sennheiser 600's or 580's. Very comfortable and smooth, extended sound. 580's have been going fairly cheaply, and you should be able to get a used pair of '600's for ~$200-250.

I have to agree with the Senn 600 or 580 recommendation. In the past I tried various brands and models and was never able to listen to them for more than 30 minutes or so. All were hot and uncomfortable. But even worse was the sound. On a chance I bought a pair of Senn 580 for $140. What a difference!! I've been able to wear these cans for over an hour without *any* discomfort. Even better is the sound. However, the Senn's really need a headphone amp to sound their best. The only cans I like better, and for rock/pop only, are the Grado SR60s - they are hot, but not too uncomfortable.