Alright, so I just did a major upgrade on my computer and I want to format and start fresh. I will have a C2D, 2 gigs of DDR2 800 ram and two 8800 in sli, this is my new gaming rig for the next couple years. Anyways, should I go with XP pro 64 bit or should I go to Vista Ultimate. Money is not really an issue since I can get either or for like 10 bucks at university, so which one is better? Should I wait for vista or just dive in now? Thanks.