A few months later a short update: I shot with the Leica M6 occasionally and really like it. I mostly used the C-Sonnar 50mm 1.5 which is a very nice lens, and I added soon a cheap Elmar-C 90mm that also seems to perform well for my landscape purposes. Now I just added a Super-Wide-Heliar 15mm and Color-Skopar 21mm 4 and am very curious how they will perform. It's difficult to understand the appeal of this system before you used it once. But the tiny optics and high optical performance are really nice features and unique compared to other systems.