I use clamshell binders from Unikeep.
I've migrated all of my older cards from Card Savers to mylar holders. New stuff goes into Card Savers. I put the holdered cards into pages with # of pockets varying by card size. My tobacco cards are in mylars that fit 9-pocket pages, for example.
It probably wouldn't be good for sets but it is perfect for my random bric a brac/type card approach.