PCPartPicker part list:
http://pcpartpicker.com/p/GQ5v
Price breakdown by merchant: http://pcpartpicker.com/p/GQ5v/by_merchant/
Benchmarks: http://pcpartpicker.com/p/GQ5v/benchmarks/
CPU: Intel Core i3-2120 3.3GHz Dual-Core Processor ($117.27 @ Amazon)
Motherboard: Gigabyte GA-H77-DS3H ATX LGA1155 Motherboard ($98.98 @ Outlet PC)
Memory: Crucial 8GB (2 x 4GB) DDR3-1600 Memory ($41.99 @ Newegg)
Storage: Western Digital Scorpio Black 320GB 2.5" 7200RPM Internal Hard Drive ($45.89 @ Compuvest)
Video Card: Asus Radeon HD 7870 GHz Edition 2GB Video Card ($234.99 @ Microcenter)
Case: Zalman Z5 ATX Mid Tower Case ($24.99 @ Newegg)
Power Supply: Antec Basiq 430W 80 PLUS Certified ATX12V Power Supply ($42.39 @ Amazon)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($17.99 @ Newegg)
Total: $624.49
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-01 16:53 EST-0500)