For headphones that are fairly common/popular, I suggest buying a pair used. If you check out the "for sale" forums on Headfi.org, there's almost always a pair or two in mint-minty condition for well under $300. There's also the HD600 (which I actually preferred to the 650) for under $200 used. Heck, I sold mine for $120 about a year ago and they were in great condition.