Given the restraints, the CF-version would be the best choice.
Better ergonomics than the older ones, still more than good enough compared to the newer CFi.
And not as old as the C lenses (they are really getting on a bit now, the oldest being over 50 years old), yet 'young' enough for most to not have developed signs of age that would compromise function.
The CB lens is rather rare, and not quite as desirable as any of the others. The "B" stands for budget, and something had to give to make it (a tiny bit) less expensive. And that something was not just in the mount, but also in the lens design.
CB lenses were meant to provide an entry level to the Hasselblad system, and you were supposed to want to move on to the top level eventually. So they had to build in a reason for you to do that too.
(You can tell that by the the time they came up with that ploy, the spirit of Victor Hasselblad had already well and truly left the company. Victor would have only wanted to sell us the best he could. He cared about photography and photographers. No such two-tier nonsense then.)
And that meant that of the three available CB lenses, only the 60 mm CB was as good a performer as the one in any of the other series (simply because it was the same design put in a CB mount). The 80 mm CB is not as good as any of the other Hasselblad 80 mm lenses.
(In some markets there briefly were 4 CB lenses: an additional CB version of the 120 mm Makro-Planar complemented the set. I don't know if that too presented a step back in quality. It never had a chance to find its way around the world, since by then the CB marketing scheme had flopped.)
Obviously the CFE/CFi version would be the most desirable of them all. But also is the most expensive.
And finally: whichever version you decide on, remember that even a very young lens may have been beaten to death already And that even 50+ year old lenses might still have lots of life in them.
So carefully inspect and test the lens you are considering to buy.
