Good point. I originally thought RAID 5 had the speed advantages of RAID 0 with extra failsafe measures, but it looks like it's actually slower with write speed than RAID 1, making it much less attractive. Since speed is actually a higher priority for me than failure prevention, I may actually just go with RAID 0, using my USB HD to backup frequently. This would also be the cheapest since, ideally, I'll only have to purchase a single 250GB HD. Do you think that using a WD2500KS and WD2500AAKS together for RAID 0 will work well?