This is a complete build that is pretty beast. I included a pretty good monitor and a copy of Windows. If you get the processor from microcenter, and the rest on NewEgg and NCIX, it will come out to be about $1300 after rebates.
If you have any questions on anything, just ask.
PCPartPicker part list:
http://pcpartpicker.com/p/jZ0s
Price breakdown by merchant: http://pcpartpicker.com/p/jZ0s/by_merchant/
Benchmarks: http://pcpartpicker.com/p/jZ0s/benchmarks/
CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($179.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($27.98 @ NCIX US)
Motherboard: ASRock Z77 Extreme3 ATX LGA1155 Motherboard ($109.99 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($39.99 @ Newegg)
Storage: Seagate Barracuda Green 1TB 3.5" 5900RPM Internal Hard Drive ($64.99 @ Newegg)
Storage: Corsair Force Series 3 240GB 2.5" Solid State Disk ($139.99 @ Newegg)
Video Card: Asus GeForce GTX 670 2GB Video Card ($379.99 @ Newegg)
Case: Cooler Master HAF 922 (Black) ATX Mid Tower Case ($79.99 @ Newegg)
Power Supply: Corsair Builder 600W 80 PLUS Certified ATX12V Power Supply ($49.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($15.99 @ Newegg)
Monitor: Asus VH236H 23.0" Monitor ($139.99 @ NCIX US)
Operating System: Microsoft Windows 7 Home Premium SP1 (64-bit) ($92.99 @ Amazon)
Total: $1321.87
(Prices include shipping, taxes, and discounts when available.)