I didn't punt my M3's to the back, I have 2 running as my center. If the M2's sound anything like the M3's, then they sound AWESOME! Now you have me curious on how much of a difference there would be between the M3's and the M2's? I had the M22's and I liked the M3's better.........a lot better. I don't like an in your face speaker which is what the M22 came across as to me. I like it a little more subtle and the M50's and the M3's are that in a nutshell.