My First Gaming desktop !

Hey hi guys I want to get a new gaming computer I need your help...

Approximate Purchase Date: this week
Budget Range: 1000/ After
Rebates; After Shipping 
System Usage from Most to Least Important: gaming
 Are you buying a monitor: / No  
Do you need to buy OS: Yes
Preferred Website(s) for Parts: dont matter l
Location: City, State/Region, Country - bronx, new york
Parts Preferences: dont matter
Overclocking: Maybe 
SLI or Crossfire: Maybe 
Monitor Resolution: 1920x1200
Additional Comments: i want a wireless keyboard and mouse please
Check out this one I made myself any advise so I can get better graffics?

PCPartPicker part list: http://pcpartpicker.com/p/wHm7
Price breakdown by merchant: http://pcpartpicker.com/p/wHm7/by_merchant/
Benchmarks: http://pcpartpicker.com/p/wHm7/benchmarks/

CPU: Intel Core i5-3570 3.4GHz Quad-Core Processor ($214.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler ($19.99 @ Newegg)
Motherboard: ASRock H77M Micro ATX LGA1155 Motherboard ($69.99 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($49.99 @ Newegg)
Storage: Intel 330 Series 120GB 2.5" Solid State Disk ($94.99 @ NCIX US)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ NCIX US)
Video Card: EVGA GeForce GTX 660 2GB Video Card ($239.99 @ Newegg)
Sound Card: Asus Xonar DG 24-bit 96 KHz Sound Card ($26.99 @ Best Buy)
Case: Cooler Master HAF 922 ATX Mid Tower Case ($99.99 @ Amazon)
Power Supply: SeaSonic 620W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($88.53 @ Amazon)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.99 @ Newegg)
Operating System: Microsoft Windows 8 (OEM) (64-bit) ($87.99 @ NCIX US)
Keyboard: Gigabyte KM7580 Wireless Slim Keyboard w/Optical Mouse ($23.48 @ Amazon)
Total: $1094.90
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-09 15:51 EST-0500)