I agree with chess and gem. Also, I heard the M3s and M22s today. Even though the M22s have greater resolution/more detail/higher efficiency, my wife and I both preferred the M3s. We found them easier to listen to. I find that M22s make you listen surgically/critically but M3s/M60s allow you to relax. Anyone who has experienced what I'm describing most probably knows what I'm talking about.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated