I finished building my new media server and wrote it up. I had quite a bit of trouble getting the Promise SATA378 driver to work properly. Finally figured out you need to F6 and install it at the beginning of the Windows Server 2003 install despite the installation instructions. It took a few days to figure that out.
I've configured a 698Gb (soft) RAID 5 array and I'm quite happy with the performance of it. I can now keep working on ripping my CDs. Next thought....wonder if I could run a video server?