The Olympus EM-1 is a light and excellent choice for mirrorless! I used to have that system and I really love it! It takes beautiful pictures with little to no post processing required after that. If you do not want to have the hassle of changing lens now and then, even the Canon G7X compact is good since it comes with a 24-100mm equivalent F1.8-2.8 lens. If you are feeling rich this month though, you could of course go for the Sony A7R II.