I got a pair of Denon Ah-D2000's in the summer of 2009, with my internship money, and have used every week since. Absolutely fantastic headphones; supremely comfortable, sound amazing, and excellent/sturdy construction. Super long cord too, so if you want to step away from your source for some reason, but still have them on, you can.
It looks like Denon has stopped making these headphones, so you'd probably have to buy third party. But if you're looking for fantastic headphones, I'd vouch for them.