I've never built a PC until the day before you posted this thread. Kind of ironic. I wanted to build something <$500. I regret not opting for the FX 6300 or the 8 core after realizing there wasn't a big price difference.
FX-4100 Zambezi 3.6 stock, plan on OC to 4.6ghz
Sapphire 7770 ghz edition
8 GB Ripjaws DDR3
500 GB HDD
500W Silverstone PSU
23" Acer