We're off walking in the lakes for a week and three systems is too many, so after much heart searching the A7 stays home and the EM1 with it's lovely 12-40 is coming as a companion to my M kit. (I guess I also trust the weathesealing on the Olympus better too!).
My son Silas is taking an M6 and a mint condition Nikon F100 which he just bought for£145. Film only! I used to love my F100, what a fantastic camera.