Meh, I stand by my decision. It's impossible to ask what the best piece of hardware is, because opinion is the major basis for that decision. Not saying your guys' suggestions aren't great, just saying I stand behind mine for the above reason.
I use the Corsair 650w. This PSU has been highly regarded as the best in many reviews. Best because of being reliable. It is rated correctly and is affordable. Corsair also includes a 5 year warranty.
Corsair and Seasonic are two brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty.
Currently I have a Seasonic X650 Gold that I purchased 8 months ago. I can confirm that it is an almost silent psu. It has a unique design which allows for passive cooling most of the time. Voltage has been well within specifications and rock steady.