SATA I vs. 2 isn't an issue just yet and may not be for a while. For a gaming-only box, none of your options matters a whole heck of a lot. RAID0 Raptors will start up faster and load games faster, but not impact gaming a lot. If you're doing repeated openings and saves of large files, RAID0 can save significant time over the course of a day. RAID1 can give peace of mind. For a pure gaming box with no cost worrys, I'd start with a 150GB Raptor and call it good. Put your bucks where they will do the most good, like mobo, CPU, RAM and VGA.