Asus P5n-e Sli
 

The ASUS P5N-E SLI motherboard rings in at about $130 USD,
which makes it substantially cheaper than many of the NVIDIA nForce 680i
SLI motherboards on the market and even some of the nForce 650i
motherboards. While this motherboard may be affordable, does it deliver
upon the ASUS quality and innovations that enthusiasts have come to
expect from their cutting edge products? Well, some of its many features
include Intel Quad-Core support, NVIDIA SLI, and HD Azalia Audio.

http://www.phoronix.com/vr.php?view=9962