PCPartPicker part list:
http://pcpartpicker.com/p/9KLqNG
Price breakdown by merchant: http://pcpartpicker.com/p/9KLqNG/by_merchant/
CPU: AMD FX-8320 3.5GHz 8-Core Processor ($134.99 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($28.66 @ Amazon)
Motherboard: Gigabyte GA-990FXA-UD3 ATX AM3+ Motherboard ($119.99 @ Micro Center)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($72.00 @ Newegg)
Video Card: Gigabyte Radeon R9 280 3GB WINDFORCE Video Card ($199.99 @ NCIX US)
Case: Fractal Design Define R4 w/Window (Titanium Grey) ATX Mid Tower Case ($82.99 @ NCIX US)
Power Supply: Rosewill Hive 650W 80+ Bronze Certified Semi-Modular ATX Power Supply ($59.99 @ Amazon)
Total: $698.61
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-09-17 02:52 EDT-0400
CHANGES
Cpu Cooler - 212 evo performs on par I believe..
Mobo - Changed to a 990fx for easier overclocking, but to save money, you can always go with a 970 board. (I'd recommend a Gigabyte 970a-ud3p)
Ram - Cheaper ram, too little of a difference to matter in gaming