I'm currently running my 7500 to drive LCR in a 3.1 setup, at least until I get the surrounds mounted and rear amplifier setup. I use all 5 channels of the 7500 in my setup, passively bi-amping my Martin Logan reQuests (LR) with the remaining channel going to my ML Cinema.

I noticed a significant improvement with the 7500 over the 7125, which was a small improvement over the Classe CAV-75 which preceded it. I am estatic with the performance of the 7500.

Rob