I also recommended toms hardware for results.
But get Vista. Its way better than XP. XP is fading and soon dead.
Vista is getting better every day.
Many of the 3rd party driver companies are also comming in line making better more stable drivers.
SP1 for vista fixed many issues.
XP SP3 and Vista SP1 are equal in benchmarks for games.
Vista supports DirectX 10 and XP doesn't.
If your going to waist money on a super rig do it right.
