will a pair of these have enough cables, yes i need modular cables, i believe for modular 80+ certified 2 of these would be cheaper than 1 big 1200W system.
case
Newegg.com - SILVERSTONE SST-TJ07-B Black 4.0mm ~ 8.0mm uni-body aluminum outer frame, 2.0mm aluminum body ATX Full Tower Computer Case - Computer Cases LOTS OF FANS!
psu
Newegg.com - COOLMAX CU-600B 600W ATX 12V V2.2/EPS 12V V2.91 Power Supply 115/ 230 V CB, CE, FCC, TUV, cUL - Power Supplies
i would be having a 4870 X2 and a nahalem bloomfield on a x58 board, which may bring up another question, you would usually have amd+ati and intel+nvidia, but would the x2 bond with the bloomfield.
let me just put it out there
HOWLING?! HOWLING?!