Azza is not known to make quality power supply. You really can't skimp on your PSU, it's the heart of your system. You don't seem to be doing sli or crossfire so 500-600W is good enough. I'll go with 650W to have more room for future add ons.
Antec Earthwatts 650 $75http://www.newegg.com/Product/Product.aspx?Item=N82E16817371044
Corsair CMPSU-650TX 650W $95 -> $80 after MIRhttp://www.newegg.com/Product/Product.aspx?Item=N82E16817139005
Instead of using 2x 500gb, I would just go for the Samsung Spinpoint F3. It's amazingly fast at a good price.
Samsung Spinpoint F3 $60http://www.newegg.com/Product/Product.aspx?Item=N82E16822152185
I would suggest another case but I don't know your tastes. EVGA is a really reliable brand so no comments about that. G.SKILL RAMS are always good quality. I do recommend at least 1600MHz as Sandy Bridge processors will benefits from that. If you don't plan to overclock, you can put off the aftermarket heatsink. The stock heatsink works well until you push it past 4.0ish. So you will be fine. I do suggest Mugen 2 for $40 over the Hyper 212+ if you can afford it.