Why a Leica?
Maybe if you want a brand but not a specific camera because of what it can do as a tool, it can mean you don't really need any of them, or at least yet you don't know what you want...
Or you can do what I did: I thought for carrying and as tools I preferred Bessas to Leicas, and for IQ I preferred Hasselblads to Leicas, so as yet I wanted to try a Leica of my own, I decided to do it historically: I bought a Barnack instead of buying an M... It was fun, but I like my Bessas and Hasselblad better than the Leica, and every time I have an M in my hands, I miss my Bessas... I guess it has to do with what you enjoy first...
Cheers,
Juan