I got a P4 2.4b 533 with a Gigabyte 8pe667 ultra, antec true 380 psu, samsung 512 pc 2700 mem, sb live, Win xp pro (must have), Abit Siluro MX-8x 64m video. It is rock solid and a easy oc to 2.7g with stock hsf.
Xp took a little getting use to. So did the video card after updating the latest drivers. It adjust two different places. One effects the screen only and the other the video while playing dvd's. What I have is not the latest and not the greatest, however with the WD 80g special edition HD it seems fast enough for me. Good luck.