Edited part list: http://pcpartpicker.com/p/12810CPU: AMD Phenom II X4 965 Black 3.4GHz Quad-Core Processor
($84.98 @ Outlet PC) Motherboard: Gigabyte GA-78LMT-USB3 Micro ATX AM3+ Motherboard
($49.99 @ Microcenter) Memory: AMD Entertainment Edition 4GB (1 x 4GB) DDR3-1333 Memory
($29.99 @ NCIX US) Video Card: PNY GeForce GTX 650 1GB Video Card
($89.99 @ Microcenter) Power Supply: Corsair Builder 500W 80 PLUS Certified ATX12V Power Supply
($29.99 @ Newegg) Total:
$284.94(Prices include shipping, taxes, and discounts when available.)(Generated by PCPartPicker 2013-06-02 10:07 EDT-0400)
Better motherboard, better VGA, only 1 RAM bar to leave a way for further upgrading. The PSU might be overkill, but there's a deal for it right now, so I took it, too.