PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor ($149.99 @ Microcenter)
Motherboard: ASRock H77 Pro4/MVP ATX LGA1155 Motherboard ($87.55 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($36.99 @ Amazon)
Storage: Western Digital Caviar Blue 500GB 3.5" 7200RPM Internal Hard Drive ($57.99 @ SuperBiiz)
Storage: Samsung 830 Series 128GB 2.5" Solid State Disk ($109.00 @ B&H)
Video Card: Sapphire Radeon HD 7950 3GB Video Card ($279.99 @ Newegg)
Case: NZXT Source 210 Elite (White) ATX Mid Tower Case ($37.49 @ Newegg)
Power Supply: Antec EarthWatts Green 650W 80 PLUS Bronze Certified ATX12V Power Supply ($68.99 @ SuperBiiz)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($17.89 @ Outlet PC)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ Outlet PC)
Total: $935.86
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-12-13 17:28 EST-0500)

You might have to go a little over budget to get a keyboard and mouse, but this is an all around higher performing build, as the GPU is stronger, while the CPU is still one of the best for today's gaming.
 
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