Given the relatively close range used with people shots and the likelihood of some biggish enlargements being requested I am surprised how few seem to vote for the Contax 645 as part of the line up. Pre d*****l most wedding photogs came along with MF for all the semi formal stuff and then those friends or relatives who were keen amateurs took the informals with 35mm later on and in the evening.

You have the best of both worlds in your camera line up. I'd use both formats.