If you are willing to go manual focus, the Zeiss 50 KILLS the Canon lens. (My walk around lens is the Zeiss 35mm) On the other hand, I prefer the 70-200 f4 or the 70-300 f4 lens because they are cheaper, lighter and perform equally well as the 2.8 lens unless you actually shoot wide open, where the 2.8 lens shines.
But you certainly can't go wrong with your proposed kit.