I will probably get flamed for this, but honestly, I don't find the Leica glass better than L glass, I'm not saying it's worse, just different look. Some might like that look, others don't. Personally, I prefer the Zeiss look.
As for the camera body itself...I don't get why I would pay more for something that gives me less options? I mean, if I'm in the mood for manual everything, I stick the camera on M, and use mf, and be happy, but it's nice to know that I also have metering worth a damn, and af when I need to get the shot now.
I get why it's considered the best street photography camera though, being compact, but a big part of street photography is at night, and I don't really like Leica's high ISO capabilities...unless I make it B&W...and I don't want all my photos to be B&W...
I've shot with an M8 for like a week, couldn't stand it...made my hands hurt...that's a personal thing though...but what I did find is that there's no magic to the photos, no magical, OMG must have this, experience, just different, if a bit worse than with my Canons, but that could be because I haven't gotten used to it, I dunno.
What I don't get is, why would I pay so much more just to get so much less? I could care less for luxury, I buy cameras to take pictures, not as a status symbol. I mean, if I wanted a camera without all the new stuff, and without giving me options for different needs, I could just buy an old film camera :/
I guess I'll never get it