I find that when arguing about differences in image quality between the M9 and 5d2 ( I have both), we are truly discussing lens choices. Both sensors at low to moderate iso levels are outstanding. The Canon has the edge at higher values. Everything else is just lens choice. The strength of the rangefinder system is the sheer amount of boutique lenses available, each with its own unique signature. The canon system certainly has standouts, the 85 II and 35 L lenses coming easily to mind. I find with the M9 it is not always the sharpest lens that I choose, but the one that gives me a certain look. And I love 50's. On the canon I shoot the sigma 50 but on the M9 I choose between my hexanon for clarity and pop, my 1.1 nok for dreamy wide open and low light, the 1.5 nok for old school summilux look, etc. I like the choices available on the M9 system, and I don't see such dramatic look variation on the canon system. Rob