Ometta :
kwa-e :
Ometta :
That's a good midrange build and should last you a little while. Only thing I don't like in that list is the bronze rated PSU. I would get a gold rated or better. Don't cheap out on the PSU. Corsair makes really good PSU's.
May not look like it but the PSU OP chose is one of the highest quality supplies currently offered in the market, Excellent stability, high quality capacitors and it's pretty silent to boot.
Not saying there is anything wrong with the PSU he chose. I always recommend a gold rated PSU or higher for PC gamer's because he will most likely play around with CPU and GPU overclocking and that's when you want the most efficient PSU you can afford. A gold rated PSU won't cost you much more and in my opinion is well worth the extra 20 dollars or so.
Not really, I'd take a bronze PSU over a Gold one if it means I could fit better parts into the build. (This isn't really the case, OP seems to have a good amount to spend.)
And PSU efficiency has no direct effect on voltage stability and overclocking capabilities, but each man to his own.