My only point is that that is a pretty good spread to the average person and a budget breaker for many people. And I'll take the fuller sound of my 11's against Studio 20's or 40's any day even with my PB2+ to fill in.
I have the M9s for the mains with a Yamaha RXV-630 receiver, but the towers are powered by an Anthem MCA-20 power amp. I really feel that this Anthem worths every penny with those speakers. The bass of the M9s is really more controlled with the Anthem and moreover, the overall sound tone is better, dynamics are better + the M9s can be play cleaner at a louder volume. In a short sentence, people who have only a 75-80W/ch receiver with the M9s, even the M11s really miss something!