Ended up making a few changes to my original plan, based on what the store had in stock, but she's finally up and running (Ran Vista x64 for a bit, wanted Glider back, so I switched back to x86 for the moment - currently working on swapping files from Server '08 Enterprise to bypass the 3.25GB RAM usage limit).
Not pictured are a 1TB Seagate Barracuda 7200.11 and a Vantec external eSATA enclosure.
SpikedCola's Q6600 Worklog
EDIT Followed this
but Im still sitting at 3,4xx,xxx KB in the About boxes of windows apps. Guess Im switching to Server '08 Enterprise
EDIT 2 Wow, is Server Enterprise fast or what! No random hanging, nothing. Just blazing fast. Followed this
site and Im running what looks like Vista, only much faster.