I had 3.6's for 12 years, and loved a lot about them, but also always felt that there was this thing missing - slam.maybe, or midbass power, or a certain "thickness" that I want my music to have.
I moved to baffle-less speakers - dynamic speakers without the boxes. I had the Emerald Physics 2.8's, and that did it for me for many years. Still boxless and open and airy, but suddenly, there was this saturated solidity that I couldn't make my Maggies achieve in my room.
It sounds like your budget allows for even more sophisticated solutions, so this may not be relevant for you. But I found baffle-less dynamic speakers the ticket for stepping away from the Maggie sound to which I was addicted, for better and worse.
Good luck in your search.