I have been reading different info on 5.1 speaker placement. I have a sony kds-50a2020. I am running three boston acoustic p430 up front , two for the l and r and one for the center. With the tv not being flat, the center can sit on the top (which would make it closer than the fronts) or mounted on the wall above the tv. I have seen where the center should not be closer than the fronts? Also, if I mount the center on the wall, how high above the top of the tv should I set it,(and angle down) as to not have the sound effected by the tv? The front of the tv sit 21 inches out from the wall. One last thing, is it ok to mount the fronts on the wall? With the layout of my room, they would be in the road anywhere else. Any help would be appreciated..