What are your opinions? I'm hardly in a rush to buy either, but it is an interesting choice to make. Any opinion is valid. I think you would agree that the S has superior image quality, while the SL2 has better responsiveness and, dare I say, the better lenses per unit area (technically, at least). Both have excellent wide angle lenses, but only the SL2 has a wide angle zoom - and wide angle lenses is where medium format (so-called) makes a lot of sense. Not to mention that S lenses are more expensive. However, the S system does have dedicated adapters for Contax and Hasselblad AF lenses. So, yeah, it's a multi-variate problem, as they would say in psychology.