I am considering getting a new camera. I currently have a Canon 6D. I'm looking to upgrade to a camera that is easier to travel with & more manageable (I have a muscle disease). I went to the local camera store yesterday & they showed me a Sony A7R2 and an Olympus OMD EM-1. They kept pushing the Olympus, which is micro-four thirds. What are your thoughts? Anyone with experience using the Sony?