Well that motherboard is overkill if you arent planning on doing some serious overclocking. You'd be fine with a $140 quality gigabyte.
Also, the processor is more than you need for playing games and doing general computer stuff. You wont see any difference than if you bought a AMD Phenom II X4 955 Black Edition.
Same goes for RAM, for your applications 8 is MORE than plenty.
I'd take the money you saved in those spots and buy two GTX 460's 1gb. They're only about $200 each and in SLI they outperform a gtx480... run coolder and consume less power total combined than one 480.
Again, just some suggestions on places you dont need to spend the extra money, but it's your computer and either way its gonna be BADa$$
-Check out zipzoomfly.com as well. sometimes they have awesome rebates and their stuff ends up being $10-$20 cheaper than newegg for each component.