Hello, I'm looking at this 850W Corsair power supply ($140)and a Cooler master V8 ($62.43) on newegg.com as upgrades for that Asus Essentio Desktop offered on bestbuy.com. Are they good compatible choices? I live in Hawaii so its always hot here and water cooling . . . well . . . i'm a noob! any other psu and heatsink upgrade suggestions are welcome! thanks! I'll mainly be using that desktop for autoCAD and rendering on MAX . . .and some game modding.