I believe this is a decision on which other people can´t help you much...
I did struckle with the same question until last week (i also have the 80+150). I chose the 43mm. I like to shoot landscapes as well, but the 43mm will get most used on so called street photography.
From my experience with shooting 24mm (on 35mm photography) i knew i far more often would have liked wider field of view rather than narrower. When looking at the horizontal field of views, 43mm equals 22,5mm and 50mm equals 25,5mm.
It definately wasn´t an easy desicion! With my very little experience so far with the 43mm i think i made the right choice for me 🙂
Niko