PSU OMG!

Hi all. Trying to decide PSU for this system, don't want massive overkill. Storage (raid, ssd vs tb drives undecided in other thread).

MOTHERBOARD: ASUS Rampage II Extreme
CPU: Intel Core I7 975 3.33 GHz 6.4GT
RAM: CORSAIR Dominator GT 6GB DDR3 2000
GPU: BFG BFGEGTX2951792H2OCWE NVIDIA GeForce GTX 295 H2 OC
NPU: EVGA Killer Xeno Pro Network Processing Unit 400MHz

Any recommendations would be appreciated. Thank you. Looking for modular, btw.

Corsair 750w? Not sure if that's enough, if not, just step it up to the next one.

Oh modular, I think you have to go for the professional editions.

Depends on budget. You can take one from crème de la crème: Antec Signature, Enermax Revolution85+/Galaxy Evo, Seasonic M12D, Corsair HX750.
650-750W is more than enough for your setup.

yep, nvidia say 680W minimum power, but most likely that system will never draw more then 450W in real work, so 750HX would be great...