William
I have the DC1 (unfortunately the MC1 wasn't available when I made my purchase) configured for 7.1 surround using 5 monobloc amps and a 2 stereo amps (only one channel from each amp). Given that the MC1 is an improvement on the DC1 I would think you will be very pleased with that arrangement. I have my DC1 for about 3 years, it was my fourth surround processor in about 18 months. I have not had any urge to upgrade since, it is quite simply superb. Lexicon's Logic 7 is a real treat.
If you haven't already done so you might want to check out the Lexicon forum here
www.smr-forums.com/forums/index.htm
Regards
Gary