Eric,
I'd be really curious if the K100 / M75 is still your go-to speaker combo? I already have K-100s in my Bogner 212 and was thinking of trying a mix of the K-100 and G12-65 and would think that might be similar to your set up. One point through, the M75 is like 97db? The K-100 is 99db...does that cause a volume issue as in the K-100 drowning out the M75?