Good point -- like bi-amped, LF-optimized Bryston Mini-T's. Nice !!
I took the stands out from under the M40's, aligned the baffles of the M2's and M40's more carefully and toed them out a bit further - one or more of those seem to have improved the imaging.
At first glance the M2's seem to have wider midrange dispersion than the M40's so they don't need to be toed in quite as much as the M40's did on their own. I could try angling the M2's out a bit further than the M40's but that's a bit too Bose Cube for my liking.
Or I could turn the M2's around and mock up an LFRxxx system. The possibilities are endless
