Maybe the emotiva products might serve you well;Check out their website and they have a excellant upgrade plan available.
I am running one of their dmc-1 and it is quite nice; it will support 7 channel and generates 2 sides for 9; also supports 4 subs if you need that many; has balanced outputs as well.
I am running one of their dmc-1 and it is quite nice; it will support 7 channel and generates 2 sides for 9; also supports 4 subs if you need that many; has balanced outputs as well.