I agree I used to have a pretty slick RAID0 setup and I went back. You know why?! latancy. Your latancy is almost doubled in a RAID0 solution. Of course on the upside your sustatained file transfer speed is through the roof. Great for DV editing and processing. However, 95% of even gammers will use that kind of transfer speed, and latancy will actually slow you down.
I'm running a single 80GB Maxtor drive and windows and any apps/games loads super fast, faster than my 2x 40gb WD 7200 RAID0. Latancy makes a huge differance.
Leave RAID for the servers guys...