I just built an HAF 922 system for a friend and it's very quiet. I haven't had it under load much yet because I don't have his storage drive to load up with games yet, but at idle, you could easily tune it out. I also liked the case a lot in general, it was very easy to manage cables and the tool-less bays worked very well, though the case is quite huge (a good and bad thing)
I've heard a lot of good things about Seasonic PSU's if y, I used one in this build, and it felt very high quality for the price (I got a 620W modular), however this is the only one I've used, and PSU's are hard to quantify based on an individual experience.
My guess is you'd be able to run skyrim on high with that setup. Maybe ultra, or ultra - a few features. If you wanted to max out your budget, a new-gen video (7870, 7950, or 680), card would hit you a homerun in performance and put you solidly in ultra territory, but it probably wouldn't be as much bang for your buck.