PCPartPicker part list:
http://pcpartpicker.com/p/LmjfhM
Price breakdown by merchant: http://pcpartpicker.com/p/LmjfhM/by_merchant/
Benchmarks: http://pcpartpicker.com/p/LmjfhM/benchmarks/
CPU: Intel Core i5-4590 3.3GHz Quad-Core Processor ($199.98 @ SuperBiiz)
Motherboard: ASRock H97 PRO4 ATX LGA1150 Motherboard ($89.98 @ SuperBiiz)
Memory: G.Skill Sniper 8GB (2 x 4GB) DDR3-1600 Memory ($71.10 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($58.99 @ Amazon)
Video Card: Sapphire Radeon R9 280X 3GB Dual-X Video Card ($269.99 @ Amazon)
Case: Corsair 200R ATX Mid Tower Case ($49.99 @ NCIX US)
Power Supply: Thermaltake SMART 650W 80+ Bronze Certified ATX Power Supply ($54.99 @ Newegg)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($14.99 @ Newegg)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.99 @ NCIX US)
Total: $900.00