You do not need an 850 watt psu . As it is it will run on a 500 watt unit , and a 650 watt psu will run a crossfire set up .
More than that is wasted money
The cpu cooler is a very old model and is OK
But something like the Xigmatek Gaia is far better and only $20 at Newegghttp://www.newegg.com/Product/Product.aspx?Item=N82E16835233082
consier windows 8 . Lots of small improvements . And a much better license that means you can transfer it from one pc to another and not have to buy a new OS which you do with 7 oem.
Make sure its 64 bit