I tried running my M1A through several routes and never could EQ the honk out of it. I tried it through a DI box. I tried it through a Baggs Venue DI with EQ -- still very honky. I just don' think it pairs well with Gibson's mid-rangy sound, especially the J-45's mid ranginess.
I finally put the M1A in my Larrivee D3 dread and it sounds less honky, but still there. I'm going to sell it. On the other hand, I have both the Fishman Ellipse Aura and Ellipse blend pickups in two of my gitars and they both sound fantastic.
Just my experience.