Anyway, IMO, before selecting the MF camera one should first select the format he wants. 645? 6x6? 6x7? 6x9 ? 6x12? 6x17?
Perhaps one of the most interesting MF formats today is 6x12cm because aspect ratio matches today's monitors and TVs
Personally I don't feel attracted by somthing under 6x7... buy first one has to detemine is what format !
That's a decision that will never be done then.
The original format for 120 film is 6x9, because of cheap and easy contact printing. All the formats have their own fans and rationalisations.
Personally I've never got 6x7. Not a heck of a whole lot larger than 6x6, though only ten exposures per roll.
I used to think 6x4.5 was silly: "Half frame medium format"? What was the point even, then‽
Now, I'm loving it, while still using my 6x6 gear.
My point is, just chose something that you like the look and sound of, if you don't have some demanding very particular use in mind.
Good quality medium format cameras are all far better, than you are probably ever going to need for ninety percent of the stuff you'll do.
Smaller formats have the advantage of faster lenses, smaller gear, more exposures and larger depth of field.
Larger formats "just" have that effortless feel. With huge resolution and lots of ability to crop if needed.