You can't go wrong with a Corsair AX-series. I've had anywhere from 8 to 12 BFL BitForce Singles running off a solitary AX1200 PSU in the lab for some time now.
Yea, I've got a case and H100 water cooler from them and the quality is top notch. I want to step up to the power supply just to future proof and give this 2 year old thermaltake a break. I'll keep it lying around as a spare or maybe running some BFL stuff if people start dumping singles in favor of asics. Not to get rich with, just to play around with. I love dicking around with tech. Hell, I may even pick up an ASIC device, one of the cheap ones, if they actually deliver on what they say they will.