Now which f/1.4 to pick is the next challenge. The 50/1.4 G may disappoint wide open, although some here (Fons...) seem to be able to put it at good use. The Sigma 50/1.4 is sharp, but bulky as a zoom.
In the MF area, none are really convincing wide open, except maybe the Zeiss (Milvus or Otus - hardly universal given their size and weight). When comparing the Nokton with the old 50/1.4 AIS wide open, there was no big difference: the Voigt is very slightly sharper and somewhat more contrasty in the center, and has more neutral color (no "purple haze". But its sharpness seems to drop down faster away from the center, so it's more or less a draw. I'll have to re-test, my hands were less steady than usual (some visible camera shake at 1/50s), and I did not manage to frame identically.