You've been raising some big questions in the forums about 64-bit. Here's our FAQ to 64-bit Vista vs XP, and whether it's worth the hassle if you're not a workstation user, but a gamer or power user. Which is better: 64-bit Vista or 64-bit XP?
In terms of hardware support there is no question: support for 64-bit Vista far outstrips 64-bit XP. We’re not going to argue aesthetics or interface here, but if you want to be sure of running new hardware on your 64-bit system, Vista is really your only choice. Fewer and fewer vendors are going to release drivers for 64-bit XP, and many didn’t even bother in the first place. 64-bit Vista support, however, while still lagging behind 32-bit, is gradually making its way towards universal.