I have been wanting a 35mm for my M6 for the longest time. I don't have a lot of cash to spend so price is an object and keeps Leica lenses far from my reach. I had made up my mind on the 35mm f2.5 skopar until I ran accross a thread in the range finder forum about the 40mm Nokton. I can't seem to make up my mind, do I give up 5mm of focal length to get 1.5 stop more light? or vice versa. What of their optical qualities? Or the ergonomics on an M body? Any information would help.