If you buy at Fry's, you have 30 days to return the cans if you don't like them (or excjhange them)
I auditioned all the Sony's there and preferred the MDR380's over the V6's (the V6 pinched my head, felt heavy, sounded bassy, with recessed midranges and harsh highs) - will be uncomfortable after an hour, while the Mdr380's fit nice, felt light, had beautiful, wonderfully, feeling pads, and weren't as bassy as the V6's).
for gaming, try the mdr380's ($60 at Circuit City).
I just bought a pair of Sennheiser HD570's for $40 and they're going back as soon as my Grado SR80's come in.
for me, i wanna hear the 'snick' in the reload, the 'crack' in thunder and the 'snap' in glass breaking - really sharp transients. unfortunately the HD570's don't do that.
other than the SR80, i'm thinking of the Sennheiser 580's ($160) or the AKG AK501's (minimul bass boom) and a Meta42 head amp.