Cooler Master Real Power Pro RS-A00-EMBA 1000W
 

I think the best moral for this story is that you can not only not judge a PSU by it's brand, but you can not judge a PSU by it's OEM either. In the past, I've had a look at some higher wattage Enhance built units that had mediocre voltage regulation, but the voltage regulation on this bad boy is top notch.

http://www.jonnyguru.com/review_details.php?id=114