I have an E-M1 and three lenses, the 12-40, 60, and 75-300. I am worried in case I go on a trip and the camera fails. Although I love it and have faith in it, one can be unlucky. So I would like to get a second smaller Olympus camera, just the body, to take with me as a backup. I would only use it if disaster strikes. Ideally it would use the same batteries, and of course it will work with all the lenses. So two questions. In both cases let's assume cost doesn't matter, I want the best results. 1. Must be at least a little lighter/smaller than the E-M1, but must have a viewfinder, what should I buy? 2. If I wanted a really light/small option and was willing to not have a viewfinder, what should I buy?