First, got an R2C because I had a questionable Contax IIa with 25, 50 and 85 lenses and wanted something more reliable.
Second, got an R3M because I really, really wanted something good to go with the VC 40 f/1.4. The R3M arrived, of course, with the 50 f/2 Heliar Classic which was an incredible bonus. As a result-- forget the 40; the 50 is too good.
In the meantime, also got the Topcon-style Bessaflex M42 SLR with the 50 f/1.4. That's a whole other topic. All of these cameras came from CameraQuest.