I've done a couple for friends and used my Bronica ETRS along with my Leica CL. The ETRS is used for portraits and where the noise would not be intrusive. The CL got used for where the Bronica could be noticed due to the sound and for candids, alter shots, etc. Barely noticable and quiet and with the 40 and 90mm lenses a very good wedding camera for my shooting style.
Also, I used the 35mm back on the Bronica as much as the 120 backs. At some point friendships have to be balanced against costs. The results were excellent when using the 35mm back on it. When I thought the shot may go beyond the 8x10 I slapped on the 120 back but mostly used the 35mm back.