Dont get an I7 975 for your rig. Complete waste of money compared to other I7s on the market right now.
With an I7 920 U can hit 4 ghz easily with the megahalems. Hell i seen some rigs hit 5 on air with the same cooler. If the folks at digital storm only clocks your cpu to 4
Xeno NIC cards are a waste of money but buy if you got the bling to burn.
For OC'ing the video cards all you need is EVGA precision or some ATI equivalent.
You should buy your monitor, razor mouse, speakers etc off newegg or some other e-trailer. Chances are they gona overprice that shit by a large margin.
All you need is 1 SSD for the OS and another 500GB-1TB HD. Dont see any reason anypoint for a raid SSD
As for spending 10 grand on a PC, i rather get myself a new car ehuehuehe