But this is what I would do for starters. You could easily add an optical drive and 4GB more RAM at any time later as well as an after market cpu cooler for easy overclocking. The extra money saved on those things allows for a much better motherboard and a more powerful video card.
PCPartPicker part list:
http://pcpartpicker.com/p/3H824
Price breakdown by merchant: http://pcpartpicker.com/p/3H824/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3H824/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ NCIX US)
Motherboard: MSI 970A-G46 ATX AM3+ Motherboard ($69.99 @ Newegg)
Memory: A-Data XPG V1.0 4GB (1 x 4GB) DDR3-1600 Memory ($34.99 @ Newegg)
Storage: Western Digital Caviar Blue 500GB 3.5" 7200RPM Internal Hard Drive ($52.48 @ OutletPC)
Video Card: EVGA GeForce GTX 760 2GB Video Card ($239.99 @ NCIX US)
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($32.99 @ Micro Center)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($34.99 @ Micro Center)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $665.40
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-09 23:25 EDT-0400)
Intel version
PCPartPicker part list:
http://pcpartpicker.com/p/3H89X
Price breakdown by merchant: http://pcpartpicker.com/p/3H89X/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3H89X/benchmarks/
CPU: Intel Core i3-4130 3.4GHz Dual-Core Processor ($119.97 @ OutletPC)
Motherboard: Gigabyte GA-B85M-D2V Micro ATX LGA1150 Motherboard ($57.79 @ Amazon)
Memory: A-Data XPG V1.0 4GB (1 x 4GB) DDR3-1600 Memory ($34.99 @ Newegg)
Storage: Western Digital Caviar Blue 500GB 3.5" 7200RPM Internal Hard Drive ($52.48 @ OutletPC)
Video Card: EVGA GeForce GTX 760 2GB Video Card ($239.99 @ NCIX US)
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($32.99 @ Micro Center)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($34.99 @ Micro Center)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $663.18
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-09 23:29 EDT-0400)