Im currently waiting on my power supply to get here to put my new system together which includes the Intel i7 920, OCZ DDR3, etc. Ive been using XP and have yet to purchase Vista. My question is should I go ahead and purchase 64 bit Vista or continue using the copy of XP I have until Windows 7 comes out? I know for some of you its an easy decision but another $180 or so for OEM version isnt easy to justify after purchasing all this hardware. 

