I was wondering if I got an 64 bit AMD CPU and a motherboard....would I have to get WinXP 64 bit edition? or would winxp pro work? are there many advantages to getting a 64bit processor? Do any of you have a motherboard/processor combo you would suggest? I do use a lot of processing power...video editing...photoshop some gaming....etc.. I kinda want it to have PCI express...(do PCI express Motherboards come with an AGP slot?) Thanks!