Seasonic makes very good power supplies, and this pirticular one has a great price and build quality.
http://pcpartpicker.com/part/seasonic-power-supply-s12ii620bronze
You can read on it here: http://www.hardocp.com/article/2010/05/18/seasonic_m12ii620_power_supply_review/9
Basically it's built very well inside and out, easily provided power at 45c, high quality capacitors, and did very well with voltage regulation.