Bose Quietconfort 15 headphones, even though I think that since I'll be getting the iPhone, I'd settle for a less expensive pair of noise-cancelling headphones
(Do you guys have any suggestions bout that?)
I think it depends on what you're looking for on a pair of headphones. I have those and I love them, I got them mainly for the noise canceling and because they feel really comfortable. But if you're picky about the sound (I'm really not) there are probably other options you can look into.