I have purchased it already, I just wanted to see what exactly I am getting since it will not arrive for a while.Question, is it possible for me to upgrade it to i7 or no? And if so, how much money would it cost?
Well, you already bought it so just use it, Phenom II X6 1045T is not bad, actually it's a good cpu. Along with HD5870 you can play most of games with decent setting (even maxed out) on HD monitor.
Don't cheap out on PSU, it's the most important thing inside your PC, make sure you have enough power to run HD5870.