Need a $600 build or a $800 build

[gooeymonster]

Monitor is 1600x900, i have keyboard mouse and everything already. I just need a build that'd be the best bang for buck.

Would prefer to buy from Newegg but amazon is fine as well. Will be using it for gaming mainly, with some web surfing.

One more question, would the intel i3 3220 be effective in a budget build, or is dual core redundant now?

edit: and i will be overclocking if need be
edit : dont know how i forgot, i'll also be needing a new OS

 

[vN3MO]

How do you feel about MicroAtx which is basically only smaller. It will be difficult to build in but it would be cool.

 

[vN3MO]

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

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($119.99 @ Microcenter)
Motherboard: ASRock 960GM/U3S3 FX Micro ATX AM3+ Motherboard ($60.97 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (1 x 8GB) DDR3-1600 Memory ($45.98 @ Outlet PC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($69.98 @ Outlet PC)
Video Card: PowerColor Radeon HD 7870 XT 2GB Video Card ($239.99 @ Newegg)
Case: Fractal Design Core 1000 MicroATX Mini Tower Case ($39.99 @ Amazon)
Power Supply: Silverstone Strider Plus 500W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($77.86 @ NCIX US)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($15.98 @ Outlet PC)
Total: $670.74
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-17 19:03 EDT-0400)

 

[gooeymonster]

Thanks for your reply. I'm not really sure, as this will be my first time building. Perhaps I could try or could you make another reccomendation? Also, would I need to get an aftermarket cooler like this

http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065