Axiom Home Page Forums General Discussion Home Theater 7.1 Setup and Qs8 placement

After researching alot of the posts; what I didnt notice is talk about the distance of the rear placement of the speakers. I am in the process of building the home theater and have waited 8 months for my Axiom setup.

I will be wiring the walls so here is my question. My room is 20x25, theater seats will be at 12 feet and 16 feet roughly. Would I be best placing the speakers in front of the first set and to the rear of the second set? I have read also about placing them at the back wall with at least 4 feet difference. Is there a limit as to how far back the QS-8 should be from the listener in order to produce the sound? Otherwise if I place them in the back wall they would be roughly 9 feet behind the last seat and 13 feet from the first. Thanks for any help and I cant wait for my AXIOMS almost time to get them delivered.