"60 fps is nice" but - is it needed? If yes, that's one answer to help with your decision. If you already have lens that will work for a Nikon and a friend that will loan out lens - big advantage over buying new lens for Canon. As I see it there is only one possibly valid Con and that is the filming. I say possibly because only you can determine what you need in that area. Again, is it really needed? I've been told the Camera will be on shelves once preorders have been handled. Good luck.
Nobody should seek his own good, but the good of others. <><