Otto,
First of all; very good photos you have on your site.
But I am not at all sure that I agree with the heap of superlatives you credit to the M9. Nor the small details you find less attractive.
First of all; M9, like M8, have this tendency to reproduce some skin tones that looks unreal, sometimes. Unless the motive is a heavy drinker or has a serious heart problem. Sure, this can be fixed in post processing. But this was something that we M8 customers complained about and little has been done to fix it.
Except for the fact that 18 million pixels really isn't up to it anymore. All the competitors are up around 21 - 23 million pixels and testing existing glass to the limits. This is particularly bitter since Leica, most probably, has the best glass around. A 23 million pixel M-camera would have shown the world what a leader Leica is in optics.
The M9 sensor is practically the same as that in the M8, except for the size. There is both disadvantages and advantages with this AA filter-less sensor. You have had serious luck only to find moire' in one picture, so far. You will find more. With a AA filter included the M9 would have been far behind competition regarding resolution.
There is something I miss with the way M9 reproduced the world. It lacks the crispy contrast rich world that my Canon 1Ds III reproduces. How come? I fear that the old Kodak sensor no longer is up to what we expect of a high performance camera of 7,000 $. Some of it can be saved by post processing, but other cameras delivers this right out of the box. Some of it can't the M9 deliver at all....
That said, like the M8 the M9 reproduces some scenes, often with mixed colour temperature that no other cameras can match. A certainly unique quality. This alone is a good reason to use both a M8 and a M9. It could well be that the M8 and M9 will be sought after cameras on the 2.hand market just to be used to reproduce these unique coloured scenes.
It is an advantage that the M9 is a small and compact camera. But then we have to accept that the battery is small. But it takes no space so a spare is easy to carry around. Which is no deal at all. Be sure to run the battery dry a few times when it is new. Then it reaches it's full capacity. This small compactness of the M-system is a great advantage. In many ways. I have had small children starting to cry when I have pointed the 1Ds III towards them.
But will the M-system survive the future? I don't think so. Unless Leica decides to shake off their old fan club of 'oldies' and goes for some modern ideas. Like AF, live view and a cheaper 'solid state' rangefinder.