This debate has at least three strands.
A: What robust and well built camera to buy for using analogue film.
B: Whether Alpa (Rolls Royce\Bugatti\HispanoSuiza) is worth its exorbitant price,
C: Whether Alpa-engraved lenses (Kern, Kinoptik, Angenieux, Spectros,Kilfitt, Schneider, Oude Delft....) are any good (or worth as much as their price tag).
For A, most top-of- the- line bodies will do, but those with the longest mount to film distance (like the Leicaflex\Leica R) will severely restrict your choice. At the other end of the mount distance range, Alpa will enable any SLR lens to be mounted. With their own converters, at a price. With others, less cost.
For B, let your wallet decide and prepare to keep your investment in the garage\on the shelf\in your banks¨ vaults until your ownership lust decreases (or penury sets in).
As far as C is concerned, the Kern Switars and some of the Kinoptics were labelled as apochomatic. In my experience, they perform well enough for my needs (in the distant past, 6feet away for projecting Kodechromes on a 6x6 foot matte screen.). But then again I am still satified with some of the Alpa optics on digital and have not yet discarded them in favour of my aspherical and apochromatic Leica R lenses, so i might be too lenient on bokeh and longitudinal colour misbehaviour.
I may not be too finicky, so Yesterday I was entirely satisfied with my 60mm R-macro Elmarit at f:5,6.
So in conclusion
A: Indecision goes nowhere. Get a m43 mount cheap machine which can be replaced when it conks out and can use a great many excellent lenses (some even made by Kilfitt, Kinoptik, Angenieus etc.)
B: If you want to join the RollsRoyce collectors and want a collectable camera body for investment, my guess is that Leica sm\M , Alpa and some others has already gone up to the stratosphere, while Leicaflex, Leica R, Nikon F2, Canon F1 will come -in relation to their production volumes-
C: if your optical concerns center on say A3 format or merely on giving away pictures in smaller sizes, a number of ancient Alpa lenses and many others will do.
p.