I am building a new system and I can either afford 2 60 gig 5400 RPM IBM drives in a Raid 0 combination or 2 40 gig 7200 rpm drives. Would there be that much performance difference? Which would you rather have? The 60 gig combo will cost about $20 more. This will be a computer for school (computer engineering major) will be using CAD programs and also recording DVDs and TV with ATI ALL in Wonder Radeon.