I purchased a NAD T773 receiver and use it to run my surrounds and a pair of speakers in the living room(zone 2)What I did with my center and mains was purchase a used MCA3 Anthem amp. It produces stronger front channels and really makes the M80's sound sweet in stereo.
I did contemplate the Outlaw mono blocks as well, But I am even happier with my decision to purchase the 3 channel Anthem.

Troy

M80 VP150 4-QS8 EP600 Monitor Audio S8 NAD T 773 Anthem MCA3 II Hitachi 57" projection