As a last resort the PC&P Turbo 510 is a thought.
As a last resort? I Are you talking "last resort" due to the price tag? PC Power & Cooling makes the best PS' around. Not the least expensive (probably THE most expensive), not the flashiest, but with the best build-quality, tightest power regulation, and best warranty. I don't think anyone who appreciates quality and who understands how important consistent, tightly regulated power is to a high-performance PC is will buy a 510 ATX Deluxe series and be dissapointed.
Not trying to flame OCZ or Fortron (never used either, and I posters say they're good) but 10 years of experience with the PC P & Cs' has earned my business and recommendations. Be sure to check-out the PS ratings at 40C and 50C as well as the rated power at each Rail, and each Rails' power regulation %. The PC P & C's 510s' output of 510W is at 40C (it's 25C rating is actually 600W). Many manufacturers use power ratings at 25C which is misleading.
BTW, I have a 510 ATX Deluxe in a V1000. Fits fine, but we are not talking masses of room either.
There is only about 1" of clearance between the PS and the PS compartment wall, so where the braided loom comes out of the PS clearance is only adequate due to the thickness of the loom.
EDIT: Actually, the PC Power & Cooling 510 Deluxe is 510W rating is achieved at 50C. 600W@25C, 550W@40C, and 510W@50C.