Going to need a better motherboard, cpu cooler, and the GTX 760 is faster than the 7950.
PCPartPicker part list:
http://pcpartpicker.com/p/1kJRl
Price breakdown by merchant: http://pcpartpicker.com/p/1kJRl/by_merchant/
Benchmarks: http://pcpartpicker.com/p/1kJRl/benchmarks/
CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($189.99 @ Microcenter)
CPU Cooler: Phanteks PH-TC14PE_BK 78.1 CFM CPU Cooler ($81.00 @ Newegg)
Motherboard: ASRock Z77 Pro3 ATX LGA1155 Motherboard ($84.99 @ Newegg)
Memory: Crucial Ballistix Sport 8GB (2 x 4GB) DDR3-1600 Memory ($50.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ NCIX US)
Video Card: EVGA GeForce GTX 760 2GB Video Card ($249.99 @ Amazon)
Wireless Network Adapter: Asus USB-N13 802.11b/g/n USB 2.0 Wi-Fi Adapter ($19.99 @ Newegg)
Case: Sentey GS-6000 II Optimus (Black) ATX Mid Tower Case ($34.99 @ Newegg)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($45.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($18.49 @ Amazon)
Operating System: Microsoft Windows 8 (OEM) (64-bit) ($89.74 @ Amazon)
Monitor: Asus VS229H-P 21.5" Monitor ($134.02 @ Amazon)
Keyboard: Rosewill RK-101 Wired Standard Keyboard ($5.99 @ Amazon)
Speakers: Logitech S120 2.3W 2ch Speakers ($9.99 @ Dell Small Business)
Total: $1111.15
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-07-25 23:04 EDT-0400)