obobskivich
Headphoneus Supremus
In your price range, the HD 600 are possible. And would probably be the pick if you want a balanced/neutral sound that doesn't get old after the first kiss. If you want screeching, in-your-face, harsh, aggressive treble, you could get the SR-325i. If you want a bit larger presentation with a fairly neutral balance, the K701 or Q701 are a good choice. I would regard the 701 as much better than their price implies (not that price tells you anything about anything). Might also look at the HD 598 as suggested, they're fairly balanced too. Finally, depending on your musical tastes, you might try tracking down a pair of Sony MDR-SA5000s; really world-class for what they are.