Hello...first post on this forum. Nice place you have here... I'm returning to Macs after about a 3 year build-yer-own PC diversion. I just ordered a 3ghz DuoCore mac pro from B&H. Basic config - 1 gig RAM, one Apple 500 gig hard drive, ATI 1900 and a pair of 30" ACD's. I already ordered 4 more gig of RAM from Crucial (2-gig x2) Depending on how that works out, I might buy another 4 gig of RAM from Crucial and pull the OEM 512's x2. All the risers would be filled then, but 8 gigs of 2-gig x4 is $840 vs 8 gigs of 4-gig x2 at $1749. I do a fair amount of video editing and would like to use RAID 0, so I'm wondering about HD configuration. My question: I plan on getting another 500 gig hard drive and setting up RAID 0, plus two additional 500 gigs. I've always used Western Digital in the past and have never been let down. My question is, can I pair a 500 gig SATA Western Digital Caviar with the stock 500 gig Apple drive for RAID 0, or is that asking for trouble? Rumor has always been that the drives should be matched, but I've never known if that's actually true. I'd like to skip paying the $329 for the Apple drive. Obviously, with the Western Digitals being $114 each from NewEgg, that would be my preference. However, I am emotionally prepared to spend the money for the Apple drive if necessary. I have that Apple drive on backorder, as well as two WD Caviars which should be delivered just before the computer gets here. Any ideas about mixing and matching hard drives in a RAID 0 configuration? .