Originally posted by: DigDug
Audio-Technica ATH-a900s are one of the best deals is headphones, and clearly the best under $200 headphone out there. Further, they don't need an amp to sound their best. Take a look at headfi.org where I'm a frequent and regular member.
Grados are much to shrilly for me, and cause headaches. Sennheisers require a good amp to sound good, otherwise they sound muffled and muted.
Audio-technica ATH-a900
Exactly what I was going to recommend, it fits his budget. I am not sure if it's the best, but it's a damn good deal.