If part of your desire is to collect you will need an F3 HP

and various F2s
I would have to agree that any such collection really needs an F2. I may be a bit biassed, given that that's what I have in this line.
It occurs to me that one body can be configured to be any of the variations, simply by installing the appropriate finder. The DP-1, DP-2, and DP-3 finders will make the same body into an F2 Photomic, an F2S, or an F2SB respectively, all of which are made to work with the old non-AI lenses. The DP-11 and DP12 finders will make that same body into an F2A or an F2AS, respectively, which are the newer AI-based models.