If I were given the choice between a Mamiya C220 with 80mm and a Yashica 124G? Well, I'd be looking for a 55mm and a nice case for the C220. That's just me. I've owned and used several models of the Yashicamats and Mamiya C22's, C33's, C220 and C330's. Like I said, I'll take a lighter used C220 anyway. That said, I don't own any Mamiya or Yashicamats anymore. Also, being that I'm pushing toward 80 yrs old I lean toward lighter cameras. My Minolta Autocords are very nice to use after a CLA. My first experience with the Autocord was in the late 70's and I bought one from the old Shutterbug paper magazine that use to come out. It was listed as nice (exc+) , but a little stiff in focusing. I tried to use it as is and the first day the focus lever broke off in my hand. Lesson learn, never attempt to operate a Minolta Autocord with stiff focus. Send it for a CLA and then be happy.
Sometime back I bought a Rolleicord Vb just to see how I liked it. Well, I liked it a lot and it's what I grab for flying out the door, well at my age maybe it's more shuffling out the door. My Rollei"s with their Planar and Xenotar lenses are left on the shelf as well as other very good cameras. Another camera that often gets overlooked is the old Rollei Automat. If it hasn't been abused it can make a very good user camera with a really fine lens. They also don't command as much money as other Rollei and Rolleicord cameras. My vote for the best of what we're talking about here is the Rolleicord Vb hands down.