Cinema room at house of worship. 20 x 20 x 10. 3 rows of stadium seating starting about 12' from front and the rear row is against back wall with the ceiling about 5-6' above seated position.(these are not exact measurements) My idea is a 5.x with the fronts being wall mounted, about 4' off the floor, center will have to be either above or below projector screen, and the surrounds on the side walls about 18-24" from the rear wall facing each other. Would this work? I need to get a receiver and some speakers and am trying to get this planned out. Oh...its all concrete too.