The FX6300 is by far the best cpu for this price, it is only 110$ roughly, has more cores, much higher clock speed, and is easily overclocked with a few clicks to 4.5 ghz, safe and stable. Secondly, what is the base of all your components? the Motherboard...so dont cheap out and get this crappy 50$ one. Spend a little more, and get a proven, better board. such as the ASRock 970 Extreme3, its awesome, what i use currently, and it also looks great with a black paint finish. Thirdly, the graphics card which i think is the best for the money, and is better than the amd listed above, is the GTX 660. It is very capable, can run almost everything on high-ultra, and doesnt break your wallet at only 200 roughly. Finally, i would not go with the stock cpu fan , and the best value, and by far the most popular is the CM Huper 212 EVO, and its only roughly 30$, even less with savings. Here is the best value build IMO!
http://ca.pcpartpicker.com/p/H4d88d
AMD FX-6300 3.5GHz 6-Core Processor $119.99 NCIX
CPU Cooler
Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler $29.79 DirectCanada
Motherboard
ASRock 970 Extreme3 ATX AM3+ Motherboard $89.99 NCIX
Memory
Kingston Black Series 8GB (2 x 4GB) DDR3-1600 Memory $79.99 Memory Express
Remove
Storage
Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive $49.79 DirectCanada
Video Card
Gigabyte GeForce GTX 660 2GB Video Card $189.99 Memory Express
Case
Thermaltake VL80001W2Z ATX Mid Tower Case $42.99 Canada Computers
Power Supply
Corsair CX 430W 80+ Bronze Certified Semi-Modular ATX Power Supply 59.99$
FINALLY THIS IS GONNA BE AN ABSOLUTELY BEAUTIFUL BUILD!!! ALL BLACK