After a few years I believe I have found the camera that I am most comfortable with. I have a Bronica RF645 that I've been using for years now and I'm sure it's the camera I will go to in most circumstances. I also own other cameras that I enjoy using as well, but this is my favorite. My question is, should I plan to purchase another RF645 sometime along the line? I know many photographers have "back up" cameras that they use. I've never had two of the same camera before. I tend to become attached to a camera, almost like a friend that I've shared memories with. I know though that sometime down the road my camera may break or quit working on me, then I would feel the need to get a new one. I was just wondering what everyone's thoughts were about their favorite camera and having a "backup" or do you use two of the same camera simultaneously?