Sean,
I use a 50 and a 35mm lens on my M6TTL. the 35mm Summicron ASPH is about the sharpest lens i've ever used. the f1.4 ASPH is supposed to be equally good but about a thousand more for one fstop of speed!
the view camera and the rangefinder are a good combination. my two primary cameras are the Leica and my 5x7.
Tom