I have a Benelli M4, and an M1 Super 90 and prefer them over others I have.
FWIW, I have a few other types of defensive shotguns including short Rem 870, Win M12, Ithaca 37, High Standard K120, and a Rem 11 (Browning A5) that I’ve given the whole treatment.
My favorites were the Benelli M1 and...