For the DIY4, can't find the Western Digital (WD2500KS) hard drives on Newegg anymore.
Maybe it's better to get one 400gb or 500gb drive and forget about the problems of raid 0. Seems lots of folks on this forum can't figure out how to raid drives. Lots of questions about doing it using software or in the bios, or which on-board controller to use. And, the order things done affects the outcome!