I would have suggested a 6.1 set up and try to pull the rear couch forward a foot or 2(if allowed). I have found the rear center to be very pleasing, certainly enhances action films when something comes straight out of the back.

Anyway, good choice on all the speakers and I applaud your first post, well done.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70