I am upgrading my PC with a new case, Asus M2N32 SLI Deluxe, AMD X2 4600+, EVGA Geforce 8800 GTS, 2 gigs Corsair XMS, etc etc. I was using XP Pro 32 on ym old P4 PC, should I go with XP 64 or will it really matter? My old PC was destroyed in a 3 foot fall so I do have quite a bit of info on my...