PCPartPicker part list:
http://pcpartpicker.com/p/2mskE
Price breakdown by merchant: http://pcpartpicker.com/p/2mskE/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2mskE/benchmarks/
CPU: AMD FX-8320 3.5GHz 8-Core Processor ($139.98 @ OutletPC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard ($92.99 @ NCIX US)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory ($68.00 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: Gigabyte Radeon R9 270X 2GB Video Card ($204.98 @ SuperBiiz)
Case: Corsair 200R ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($59.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($16.98 @ OutletPC)
Total: $722.87
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-18 18:20 EST-0500)
Something like this should do.
FX6300 for CPU would still be ok, but with 8320 you are less likely to need an upgrade any time soon.
R9 270 or a 7870 options for graphics as well if you can get them for a good price. Or need to save a bit of money.
The R9 270X is faster but only about 8% or so.