... well. the 5.5 was a typo. My bad.
So my attempt to be helpful didn't land... Bluntly: Get a 27" LED widescreen, a couple nice SSD drives, well enough RAM, and a really nice video card... also fairly nice motherboard, extra TB HDD... then cheap out for only $100 and get the crappy i5.
yes, it should "run 5 copies of wow".
Lesser systems can run 5 man team.
I personally run 2. Some people run one or more than 2.
Edited part: Then again, I admit I dont know as much as others as I just got into OCing so... my opinion should be taken as just that.