I'm quite surprised nobody has suggested the Sennheiser HD25 Adidas Originals (seeing how the OP wants some style to it)! I personally LOVE my HD25's. The HD25's are perfect for the genres you listed (rock, hip-hop, pop)! They've got some nice punchy bass and are a joy to listen to going to and from school. I also listen to them while at some football venues (just because I want to, haha; not sure why I do it) and at about 70% volume on my iPod Touch 3G, everything else is drowned out. Not going to compete with the QC15's active noise cancellation, but the noise isolation is superb.
There is a bit of sibilance in them, but you won't notice during normal listening; you'd have to try reeeeaaaally hard to do so. And don't worry about the "steel cable" they have. James McProgger stated in the HD 25-1 appreciation thread that the steel is just there for reinforcement and that copper is the real conductor. I've also heard that people have lots of issues with the comfort, but I've none. People have posted that lowering the cups one notch below normal listening height and putting them over a box of tissues will help.
These bad boys'll run you about $250, which is perfect for the prices you gave! I'm sure you could get them cheaper if you looked around the for sale thread, though. You can find more info on them in ljokerl's review here:
http://www.head-fi.org/t/433318/shootout-93-portable-headphones-reviewed-pioneer-se-mj71-coloud-colors-added-9-4-11
Ranking only .1 behind the Beyer DT1350's which are more analytical as opposed to these fun HD25's, I'm sure you'll love these.
Edited by Spinlight - 10/2/11 at 5:49pm