infinitydff,
I had a Marantz SR5011 and MM7055 power amplifier. I sold them and purchased an ATI AT523NC 3-channel amplifier and Marantz AV 7702 mkii. There is a significant difference and I submit a better option than adding another Marantz amplifier. Of course it depends on how much money you want to spend. The new AT52XNC can be configured based on your needs.
I had a Marantz SR5011 and MM7055 power amplifier. I sold them and purchased an ATI AT523NC 3-channel amplifier and Marantz AV 7702 mkii. There is a significant difference and I submit a better option than adding another Marantz amplifier. Of course it depends on how much money you want to spend. The new AT52XNC can be configured based on your needs.