Originally posted by: TGS
Depends on the games. If you use Punkbuster I believe they have barely just release XP64-bit support so I would be wary of that.
Frankly if you can get it for cheaper, and really don't care about the "extra" XP features, Windows 2000 is still a rather good OS for games. If price is a factor at all.
If it's a single computer you don't expect to share out reasources with, probably home. If you plan on doing some networking, I would vote with pro.