"M6 TTL 999: the Leica script and special 999 numbers are PAINTED on instead of engraved. ugh. Sorry folks, personally I would not invest in this one." ---Stephen Gandy's cameraquest dot com. I don't care about the Leica lenses because I believe they are all great---plastic or no plastic. While the M6 Classic is the non-TTL version, I understand the M6 TTL works perfectly with a hotshoe'd flash without having to worry about adjusting the F-stop. Since I couldn't find which of these 2 beauts have the beefier build quality, I'm curiuos to know how the best one compares with the professional Leica M4-P and the bigger Leica M5. Are they worth the extra money or is it better to go with what Stephen Gandy wrote? I wish to expand my Leica M buyer's guide.