http://www.superbiiz.com/combo.php?id=6176

Combo with a processor for $175 with free shipping. BTC mining specific motherboard with extra power to the motherboard so you can use normal risers instead of powered risers( http://www.amazon.com/Extension-Cable-Riser-Extender-Molex/dp/B00HZAUP9Y/ref=sr_1_9?ie=UTF8&qid=1392796462&sr=8-9&keywords=pci-e+riser ). That will save you ~$6 per riser.

Not gonna beat this deal!