I am building a new puter pretty much to run FSX maxed out (although still on XP) and for Premiere Pro video capture/editing/DVD burning.

Dual Core 6700
Intel D975XBX2 (1066 FSB)
2 GB OCZ DDR2 833 Mhz memory
1 Raptor 74GB (10,000/16MB/4.5/SATA-150)
1 250 GB drive for misc (7200/16MB/SATA-3G)
2 500 GB drives (7200/16 MB/SATA-3G) that I'm going to RAID O
XP Professional

Anyone have any idea which would be better to install Premiere on? The Raptor or the RAID?