I have the Antec Truepower TP-650 running in my current system for almost 2 years. As you all know there are many generic power supplies that advises a specific power wattage only to not deliver leaving it dead when under heavy load. Not only that, it brings your computer and its components with it as well, leading to a heavy write-off.
I chose Antec because it is a trusted brand known for its reliability. The 650W gave me headroom for upgrades and hardware additions. There are no bells and whistles with this power supply as it is made exactly what it's built for - stability and reliability.
The Antec Truepower TP-650 is a Modular power supply so it's a great choice for PC gamers and enthusiasts like myself, because you use only the connectors that are needed thereby reducing clutter in the box which allows more room for cooling. There is a fan at the bottom to draw air in for cooling. I have been running two GTS 250 video cards in SLI mode for the past 2 years and the performance is excellent when under heavy load playing games like Crysis, Call of Duty series, Bad Company 2. I don't recall having any crashes that are power supply related. Most of the crashes has been a result of incorrect drivers, incorrect dx level, and config tweaks.
Another thing I like about this power supply is the silent fan. It's 120mm in size and I can barely hear it when I leave my computer on to download when I sleep. It's been running 24 hours a day almost everyday.
The Antec Truepower TP-650 is an awesome power supply when running strenuous applications. It supplies the juice needed for your hardware and will last more you more than long enough until your next upgrade. However if you're not an enthusiast or gamer like myself, I vouch for its more standard version The Antec Truepower TP-550