I'm running a B&K tx4430 for the front (L, C, R), and a Parasound HCA1000A for the rears. It's quite nice, and it's nicer than when I was running a 5 channel B&K AV5125; and also nicer than when I was running a Parasound HCA1203a for the fronts with the HCA1000a for the rear. I think the fact that the center speaker, and rears are different than my mains introduces more "nuance" than the fact that I have 2 brands of power.