As far as I am concerned the Leica is an outdated camera.
However it would always be my personal choice. When people ask my advice which camera to buy, I will all tell them buy the one you like the most. For me the Leica is simply the sexiest camera out there, if M or R. I own thr R8 and use a borrowed M3 which I have been using the last 3 years.
The camera sure doesn`t make you really a better photographer, but if you enjoy working with a certain tool I do believe you can become a better photographer in an esoterical kind of way.
It is funny how this discussion comes up over and over again.
Everybody should use what they like not what others like.