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PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD Athlon II X4 750K 3.4GHz Quad-Core Processor ($79.99 @ Amazon)
Motherboard: ASRock FM2A75M-ITX R2.0 Mini ITX FM2 Motherboard ($91.97 @ Newegg)
Memory: Crucial Ballistix Sport 4GB (2 x 2GB) DDR3-1600 Memory ($35.99 @ Microcenter)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($66.61 @ Outlet PC)
Video Card: MSI GeForce GTX 650 Ti Boost 1GB Video Card ($129.99 @ Newegg)
Case: BitFenix Prodigy (Black) Mini ITX Tower Case ($59.99 @ Microcenter)
Power Supply: Corsair Builder 500W 80 PLUS Bronze Certified ATX12V Power Supply ($29.99 @ Newegg)
Total: $494.53
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-07-03 00:04 EDT-0400)
 
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