it is depend on what lens you like for daily use.
I have 35mm Nokton as well 50mm f1.2 canon.
I tend to use 50mm with film camera, so for rd1, 35mm work best for me.
But then come "bokeh", warmness, constrast, saturation and other lens characteristic into calculation..
Nokton, is more for color work, while canon (with it's low contrast character) is BW.
Then come sonnar. well, comparing it to the canon, it has it's own signature, so at the end sonnar 50mm is the most lens i use either in film/rd1. This is not logical decision.
So for you, try to think what is important to you, what do you want your picture will be. 35 vs 50 is only a matter of field of view, each lens has it's own character, once you know what you want, get it.
keep it small & simple :
M2-T BP, IIIc-T BP ST, H-RF, RD1, BII C-Heliar,
T is Titanium !!