Thermaltake Purepower 680 Watt
It's a rare product indeed that I can't find some fault with. The Thermaltake PurePower 680W is one of those products. Stability, power, features, finish and quality are all first rate. Hell, I'm even using the box it came in, with its nifty plastic carry handle, to store spares. I've always considered the PSU to be the most important part of a system, feeding and protecting all the other components. With a retail price of around $170 US, it's not the cheapest PSU out there, but it's not the most expensive either and factoring in what you get for your money, it's a good value.