First, you should tell us what you're going to do with this build and how much money you want to put in it. If we assume you want to play wow, then you're build is ok. But as Cilraaz mentionned, beware of noname PSU, they show 600W and can't even go to 400W without being unstable...
Also, as the roadmap of Intel goes, I would prefer an Intel CPU on a LGA1156 socket since the LGA1366 is going to be unaffordable for a common build. So i5 750 or i7 860 would be a safe investment.
Well if he you care to make a little gamble you can get the AMD Phenom™ II X2 555 and unlock it to a quad core
However this does not work on every motherboard, a quick google will bring up many results.
I unlocked my 555 to a triple (its unstable with 2 extra cores) and i got it to a stable 3.8GHZ overclock.
Thanks for all the help so far. And I will probably only be using this computer for wow, also, I'm trying to keep the build as cheap as possible, preferably under $700. However I am hesitant to install many parts myself so ordering a pre- built pc is optimal for me. Thats why this site/computer was attractive to me. However, the no name PSU seems to be a sketchy issue. I guess I would appreciate a suggestion for a good, cheap, prebuilt PC, keep in mind it will mainly be used for wow only in regards to gaming, thanks.