Upload & Sell: On
Since we're talking weddings (handholding), I'll vote for Contax 645. Handles like an SLR, quick (as quick as MF film can be), great to use handheld all day if needed, Zeiss glass is amazing. Also has a 1/4000th top shutter speed, the 80 f/2, the 35, 45, 55, 140 are all stellar pieces of glass. Vacuum insert for 220 film. The Pentax 67 w/ 105 gives really nice results. It's also a flipping brick and has a lot of limitations. Ever going to use flash? 1/30th sync is all you get and a HUGE mirror that has it's own issues at times.
Honestly, unless you shoot a Hassy H4X with True Focus, don't count on accurate AF at a wedding with most medium format cameras unless you're shooting at f/16. It's pretty much manual focus or nothing.