Thanks for the replies all!
I should have said that with the 50s, I really don’t like the big “butt” of it that makes it somewhat awkward to carry around on a strap casually. So the 50s ii, even if it’s ultimately the same size, seems like it would be a more casual carry. Not sure if that’s true or not.
It sounds like if I want better AF, I should really go for the 100S. But maybe the move is to go 50s and get the 55/1.7.
Regarding the viewfinder - the 50s is nice and large, but never feels that sharp. I saw a review that said while the viewfinder of the 50s ii is technically inferior (lower magnification, etc), it was actually easier for this guy to manually focus on it due to perceived better sharpness or contrast.
To those with the 55/1.7 and the 50s ii (or the 50s for that matter) - how is the af? Is it reliable enough for a family portrait shoot for posed (mostly still) photos? “Action” shots chasing kids around would be a different camera.