If this is a gaming only computer drop the processor to an i5 2500K or an i5 3570K. The only advantage the i7 has is Hyperthreading and no games will use this. Keep the i7 if encoding and rendering will be the main uses of the computer.
Ditch the Coolermaster power supply for something decent. With a single GTX 570 a 550w power supply is plenty. If you plan on adding a second card in the future then get a 750w power supply. You would only need a 1000w unit if you were planning on running a 3 x GTX670 Sli set up. Stick with Corsair,Seasonic, PC Power and Cooling, XFX, Silvertone, Enermax, OCZ and Antec and you can't go wrong.
Get the Hyper 212 Evo over the 212+. It's worth the extra $8-$10.
Power supplies needed by card.http://www.realhardtechx.com/index_archivos/Page362.htm