This is what I came up with for games like league of legends, skyrim, far cry, assassins creed 3, and battle field 3.
PCPartPicker part list: http://pcpartpicker.com/p/y9qR
Price breakdown by merchant: http://pcpartpicker.com/p/y9qR/by_merchant/
Benchmarks: http://pcpartpicker.com/p/y9qR/benchmarks/
CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor ($149.99 @ Microcenter)
Motherboard: ASRock H77M Micro ATX LGA1155 Motherboard ($69.99 @ Newegg)
Memory: Mushkin Blackline 8GB (2 x 4GB) DDR3-1600 Memory ($35.57 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($64.99 @ NCIX US)
Video Card: EVGA GeForce GTX 660 2GB Video Card ($209.99 @ Newegg)
Case: Zalman Z11 ATX Mid Tower Case ($40.20 @ NCIX US)
Power Supply: Corsair Builder 600W 80 PLUS Certified ATX12V Power Supply ($39.99 @ Newegg)
Total: $610.72
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-18 16:47 EST-0500)
PCPartPicker part list: http://pcpartpicker.com/p/y9qR
Price breakdown by merchant: http://pcpartpicker.com/p/y9qR/by_merchant/
Benchmarks: http://pcpartpicker.com/p/y9qR/benchmarks/
CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor ($149.99 @ Microcenter)
Motherboard: ASRock H77M Micro ATX LGA1155 Motherboard ($69.99 @ Newegg)
Memory: Mushkin Blackline 8GB (2 x 4GB) DDR3-1600 Memory ($35.57 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($64.99 @ NCIX US)
Video Card: EVGA GeForce GTX 660 2GB Video Card ($209.99 @ Newegg)
Case: Zalman Z11 ATX Mid Tower Case ($40.20 @ NCIX US)
Power Supply: Corsair Builder 600W 80 PLUS Certified ATX12V Power Supply ($39.99 @ Newegg)
Total: $610.72
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-18 16:47 EST-0500)