I noticed a difference in going to a 6.1 from 5.1 but my situation is not a normal rectangle, I am based on a diagnoal and the LR is actually more forward from one couch and vice versa for the other sitting position, the center rear really helped give more depth and direction to the surrounds for me.


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