Yeah, this is gonna be one hell of an expensive rig. Dual CPUs, dual PCI-X high-end cards, proprietary mobo & video system, water cooling,...I'd have to guess this will be in at least the $6k range. Pass. Have fun with this one. You'll be able to play Far Cry and Doom 3 at 90 fps, and then your CPUs will be out of date in a year.
Hopefully AW will license out the tech eventually and it will become standard, and more affordable in a year or two.