Nope. Got an M9 which does color AND B&W, as far as I'm concerned. Getting a second M9 which does only black and white would be the proverbial pectoralis majoris on a bull....
i snooped it from japancamerahunter who managed to test it.
the highres picture is indeed impressive.
Just a sincere inquiry for you are an experienced photographer:
Do you think that this sharpness is not to be achieved with a regular M9 and regular Summicron?