I think one question that needs to be asked is wheher you want a 5.1, 6.1, or 7.1 setup. Your post implies 5.1 since you mentioned the Epic 80 system and priced it as a 5.1 system.

With that kind of money, some people in your shoes might want to consider a 6.1 or 7.1 setup so I just want to clarify and be sure a 5.1 setup is what you are aiming for.