I agree about the 2x4GB of RAM. Also, if you get a Corsair "CX," get the CX-500M. Although they're all built by CWT, the non-modular ones use some inferior Samxon capacitors that don't like heat and are known for early failure. I would not put one in a gamer.
You will most likely want to overclock your CPU, at least some. The stock cooler will most likely be insufficient, and/or it will become very noisy. I use and recommend the Xigmatek Gaia over the more often parroted but slightly inferior Hyper212 EVO:
http://www.techreaction.net/2011/07/07/review-xigmatek-gaia-sd1283/7/
http://www.techreaction.net/2011/11/27/review-cooler-master-hyper-212-plus/4/
Unlike the Hyper212 EVO (ignore the URL; it IS the EVO they tested), the Gaia never throttled, although it wasn't always the coolest depending on the fan used.