PCPartPicker part list:
http://pcpartpicker.com/p/MWVP
Price breakdown by merchant: http://pcpartpicker.com/p/MWVP/by_merchant/
Benchmarks: http://pcpartpicker.com/p/MWVP/benchmarks/
CPU: Intel Core i7-2600 3.4GHz Quad-Core Processor ($299.98 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler ($26.69 @ Outlet PC)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($114.99 @ Amazon)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($47.98 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($69.34 @ Amazon)
Storage: Samsung 840 Series 120GB 2.5" Solid State Disk ($92.99 @ Amazon)
Video Card: PowerColor Radeon HD 7870 XT 2GB Video Card ($239.99 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($59.99 @ TigerDirect)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($61.24 @ Amazon)
Total: $1013.19
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-29 00:16 EDT-0400)
You already have the CPU so that takes $300 off the price tag bringing it down to $713.19. You can also get rid of the SSD and save another $90 if your budget is really tight.