When I looked replacement for the MM3, I listened to speakers from Raidho, TAD, Kharma, Marten, Magnepan, Wilson, Lansche, Focal Utopia, Avalon, Gyia, Joseph audio, Estelon, Hansen, KEF, MBL, Vandersteen, Sonus Faber, YG, Rockport, Nola, Aerial.... for each brand at least 2-3 different speakers.
I am lucky to live in a region where it is easy to hear most brands, and I am traveling all the time across the globe, so easy for me to go to listen to new stuff.
What I liked the most besides Magico is Gyia (but cabinet is not stable and drivers look fragile), TAD.