What will the system need?

After much research and deliberation with others, I have finally come up with a "shopping list" of a sort for this project.

Ideal Setup:
->6 or more (rack mount) computers that have:
-64 bit processors with at least dual core
-compatable motherboards
-8gb of ram per proccessor
-gigabit switch
-small hard drive (only a 10gb is needed)(speed is not a factor)
exclusions:any form of a video card is not needed but if it is intigrated it will not harm anything

->Windows Operating Systems for all the computers listed above
-XP professional/windows 7
->1 server & router
->1 license of windows server OS (for an already aquired managing computer)
->cloning software