What is your budget and your complete specs? You additions will not max out WoW, far from it.
Did you see what resolution the OP is gaming at? At 1024x768, pretty much anything should max out WoW. Hardly anyone even tests at that resolution. Here's the first hit I got on google: http://penstarsys.com/reviews/video/evga/7300gs/7300gs_3.htm
, and it's with 3+
OP, what is your current setup? There's little point in upgrading to an E6700 if you already have something that's similar in performance. There's little value in upgrading a 775 processor most of the time, as the price for one of those CPUs is very high compared to the performance you get.
I'd definitely recommend posting the info requested in the How to Ask for New Build Advice
thread, to see if you can get better recommendations for your budget.