PCPartPicker part list:
http://pcpartpicker.com/p/2Sl7V
Price breakdown by merchant: http://pcpartpicker.com/p/2Sl7V/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2Sl7V/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($114.47 @ OutletPC)
Motherboard: Asus M5A99X EVO R2.0 ATX AM3+ Motherboard ($114.97 @ OutletPC)
Memory: A-Data XPG V1.0 8GB (2 x 4GB) DDR3-1600 Memory ($79.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: Asus GeForce GTX 760 2GB Video Card ($249.99 @ Microcenter)
Case: Thermaltake Commander MS/I Snow Edition (White/Black) ATX Mid Tower Case ($34.99 @ Microcenter)
Power Supply: Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply ($54.99 @ Microcenter)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($14.99 @ Newegg)
Operating System: Microsoft Windows 8.1 - OEM (64-bit) ($99.98 @ OutletPC)
Total: $824.35
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-12 23:29 EST-0500)
This is a decent build, if you actually are willing to go to $1k I can do better.