SSDs are WAAAY to small that is why.
Thank you for that feedback. I took it to heart and switched the hard drive build to a RunCore Pro IV 128GB for the boot drive and a Samsung SpinPoint 1TB for primary storage. The velociraptor has been delivered, and I'm assuming I will send it back -- although I suppose I could add it as a secondary storage, which might be a waste of money, except perhaps to use it for all essential on-site backups.
Here's the system I'm ending up with
Graphics Card: GV-N460OC-1GB
Case: Antec P183
Memory: Corsair Dominator GT 6 GB PC3-16000 2000Mhz
Hard Drive: RunCore Pro IV 128GB 2.5" SATA Solid State Drive
Processor: Intel Core i7 950
Power Supply: Antec CP850
Storage: Samsung SpinPoint F3EG HD103SJ 1TB
Fans: Thermal SpinQ VT
???=WD VelociRaptor 300 GB