Hiper Type M 780Watt Power Supply
 

The Hiper Type M 780W is a great all-round power supply. It offers an exceptionally stable 12V line and is sufficiently quiet to not annoy you during every day PC use. Also it supports SLI or CrossFire with a high efficiency of over 83%. With a price of around $125 it is cheaper than similar products from bigger brand names.

http://www.techpowerup.com/reviews/Hiper/Type_M_780W