Well, I've finally made my decision for an M body to use with film. And it's rather non-linear.
I'm going to get a Chrome M4 but have Sherry K. or DAG replace the timer and frame preview levers with the metal ones from the M3. Then I'll have the black articulated plastic advance lever replaced with an M3 metal lever.
This give me the 35, 50, 90, 135 frame line and other M4 features but the classic look of the M3.
I may have it by my 63rd birthday.