I'm in the process of getting parts for my new build, and I ordered 2 of the SATA 500gb WD Caviars w/ 32mb of cache. Originally I had planned to use them in a RAID 0 config, and run regular backups of critical data to an external HD. But now I'm having second thoughts as the more I read it sounds like the performance gains offered by RAID 0 aren't really that significant. So now I'm wondering if I should run them in RAID 1, or just run them in a standard non-RAID configuration and just install everything to the first HD, and regularly backup to the 2nd drive. What do you guys recommend?