PCPartPicker part list:
http://pcpartpicker.com/p/2hbhM
Price breakdown by merchant: http://pcpartpicker.com/p/2hbhM/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2hbhM/benchmarks/
CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($224.98 @ OutletPC)
Motherboard: ASRock Z87 Extreme4 ATX LGA1150 Motherboard ($117.99 @ Newegg)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($49.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: MSI Radeon R9 280X 3GB Video Card ($309.99 @ B&H)
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($39.99 @ Microcenter)
Power Supply: Corsair Builder 600W 80+ Bronze Certified ATX Power Supply ($54.99 @ Microcenter)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($82.98 @ OutletPC)
Total: $940.89