I'm sure we all share the problem of how to display the collection (or even just how to store them...). If you want to have a number of speakers displayed both nicely and in a useful way, the problem will be even worse. I'd guesstimate that three pairs is about the maximum you can have in a single "normal" room, still positioned optimally.
So one example would be to have a pair of wall mounted early panel speakers or bookshelf speakers for the real vintage stereo (excl. Beolab 5000), a pair of S45.2 on a shelf or on the floor for the mid-powered '70s, and a pair of larger floor speakers (MC120.2 or similar) that would work all the way until the last models that could drive passive speakers.
You can of course do with one pair for all. I've never shared the idea that the tiniest amplifiers would have problems with large speakers. I just connected a pair of S80.2's to a Beomaster 900 and it had absolutely no problems filling the room with bass! There will be a limit to it of course, but that's just a question of volume.