It seems to me this kind of questions, spanning several brands (Leica, ZI, Voightlander) is best asked in a general forum, no ?
By putting this poll in the Leica M forum, you're "filtering" the respondents; how many Leica-users ever had a look at Voigtlander, and know e.g. that the R3A and R3M have 1:1 viewfinder, and not .91 like the M3 (present company (that's all of you) excepted, of course 😛) ?
OTOH, how many Voigtlander or ZI users read the Leica M forum (present company (that's me)... etc 😀) ?
Before somebody takes a large stick: I just bought a M6 TTL and waiting for it now .... 🙂
BTW, I voted for the R4A: no other VF can beat it when you like ultra-wide. I do like the R3A and the Hexar RF very much though.
Stefan.