Splendid 66 x2, no match for Olivetti Valentine x13!
A duo of Olympia SFs
Vanilla and Sage
Ring a Ring o' Roses
What typewriter would I want to collect over and over, myself? Perhaps a whole array of basket-shifted '50s Underwoods: Golden Touches/ Leaders/ Finger Flites, in all their different colors and shapes. Now that's a theme I could get behind.
Either that, or a whole variety of Groma Kolibris - mainly because they were produced in such an impressive array of colors that it would be fun to collect them all. But they would be my second choice because from what I have seen, their delicate mechanisms leave something to be desired as far as having withstood the passage of time.