2 Raptors in RAID 0 is a good data cruncher.. You'll be hard pressed to look for alternatives in current mainstream hard drives which would surpass that performance with just two drives.. Moreover, with increasing amount of hard drives, peformance may increase, but reliability becomes a question.. May be a RAID 0 NAS setup with 8 5400 RPM will provide the required performance at the max reliability and minimum cost..