What is the lowest magnification I would need to clearly make out Saturn’s rings?

I’m about to treat myself to some binoculars. I’ve seen some decent looking zoom binoculars (I know zoom bins aren’t quite as good as fixed mag ones) varying from 10 to 100 times magnification and from 50 to 100mm aperature. Most of the time I’d probably use them on the lowest power for looking at [...]