I thought you have M80v3. How about M2v4 that you can move into the room and get a deep and wide soundstage outside of the speaker boundaries? They're more linear than an M100 but won't go as loud. But you're only 11 feet away. Then you can upgrade the QS8 to QS10.

M5s would work too. M2v4 and M5v4 is better than M80v2. I can hear Alan saying "Dammit Mojo. You should know better. You know it's a matter of degree." Yeah, I know better. M2s and M5s are better. smile

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated