I have mainly been using the M9 with the 35/1.4 Lux so far, with the exception of one day using only the Heliar 50/3.5. I used the SWC yesterday, and I just mounted the CV 25/4 on the M9 while we are still in our apartment.
I set the M9 to ISO 160 each morning, and I increase the setting to 320 and then to 500 and then to 1250 as the day progesses for street photos. When we are inside a building, I use ISO 1250 or so.
So far, I think that I made the right choices for the equipment.