Rage96, have you considered getting a 5.2 system? I ask because
a) you're getting a second job to pay for this so biggest bang for the buck does matter
b) It's a lot easier to get smooth bass with two capable subs (and EP-500 are very capable)
c) You don't get *that* much more out of the two rears than having just two surrounds.
So an Epic80/2X500 system would be almost the same in terms of price. Or you can even try Epic80-500 to start with and add the extra sub if you feel you need more bass. Something to think about.