If your not going to be gaming just use a HTPC motherboard with integrated sound/video and hook it up via HDMI and plickety plow done at a fraction of the cost.
Here's a few:
http://www.motherboards.org/reviews/...ds/1705_1.html
The one I will be using is this, it cost me $106 shipped.
http://www.gigabyte.co.nz/Products/M...ProductID=2600