You were about to waste a lot of money on overclocking. Remove that and you can afford a GTX770 which is several tiers better than a GTX660.
That is an awesome case, and I added a better more powerful power supply.
PCPartPicker part list:
http://pcpartpicker.com/p/3FlrT
Price breakdown by merchant: http://pcpartpicker.com/p/3FlrT/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3FlrT/benchmarks/
CPU: Intel Core i5-4570 3.2GHz Quad-Core Processor ($192.99 @ NCIX US)
Motherboard: ASRock H87 Pro4 ATX LGA1150 Motherboard ($78.36 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($68.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($54.44 @ Amazon)
Video Card: Asus GeForce GTX 770 2GB DirectCU II Video Card ($319.99 @ NCIX US)
Case: Cooler Master N400 ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: EVGA 600B 600W 80+ Bronze Certified ATX Power Supply ($49.99 @ Micro Center)
Optical Drive: Asus DRW-24F1ST DVD/CD Writer ($19.99 @ Newegg)
Monitor: Asus VX229H 60Hz 21.5" Monitor ($139.99 @ Newegg)
Keyboard: Cooler Master CM Storm Devastator Gaming Bundle Wired Gaming Keyboard w/Optical Mouse ($29.99 @ Amazon)
Total: $996.72
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-06 23:17 EDT-0400)