Ditto. I've got an M6 TTL (though I don't use the built in meter, in fact, I've never put the meter's battery in, I use an external incident meter since slide film is rathe unforgiving and ... I'm not very good) and I would never buy a digital Leica.
That being said, the Mamiya/Sony digital format rangefinder rumor [0] sounds interesting but what has really piqued my interest is David Hobby's [2] preview of the Fuji X100T's Classic Chrome (read: Kodachrome), Velvia and Provia modes [3]. If I go digital, that's probably the first camera I'd look at.
[0] http://petapixel.com/2014/09/30/rumor-sony-mamiya-release-me...
[2] https://en.wikipedia.org/wiki/David_Hobby
[3] http://petapixel.com/2014/09/10/classic-chrome-film-simulati...