Going from towers to M2s in that room as mains for a theater would not be my recommendation -but we know little about the room.
Minorc, If you could give us full room dimensions it would help. We’ve established you sit 11’ away from speakers placed 10’6” apart in a room with 10’ ceilings and employ a membrane up front that covers a concave (almost parabolic) alcove.
How wide is the room and long? What is happpening at the rear of the room?
Or..... Just buy large towers again and let Dirac in your AVR860 help you out. Dirac is pretty dang robust and frankly deals with the issues caused by “too much” easily.
The M2s are nice (heard powered ver. in a computer setup) but not my choice for an explosion in a soundtrack. Large speakers are capable of the soundstage and imaging of small mini monitors if set up properly in the room.
