PCPartPicker part list:
http://pcpartpicker.com/p/3PZYM
Price breakdown by merchant: http://pcpartpicker.com/p/3PZYM/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3PZYM/benchmarks/
CPU: Intel Core i3-4130 3.4GHz Dual-Core Processor ($113.98 @ SuperBiiz)
Motherboard: MSI H87M-E35 Micro ATX LGA1150 Motherboard ($65.98 @ SuperBiiz)
Memory: Kingston HyperX 8GB (2 x 4GB) DDR3-1600 Memory ($74.99 @ Micro Center)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($54.43 @ OutletPC)
Video Card: XFX Radeon R9 270X 2GB Double Dissipation Video Card ($179.99 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX US)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($15.98 @ OutletPC)
Total: $605.33
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-24 11:04 EDT-0400)
This rig will only get to high at 720p so you might want to upgrade to an i5 and a better GPU if you want to move to 1080p at the same setting