The choice between Canon gear and Nikon, Sony, etc. gear is no choice at all. ... Besides, this is a Canon forum, not a Nikon one.
I promise to discuss only about Canon-stuff again, if and when Canon comes up with something worthwhile to talk about. FF-sensored mirrorless system camera plus assorted lens-linep. Even better, but not much more expensive than the Sony A7R ... would be my preferred subject.
Until that happens we'll continue to have fun disecting Nikon's sorry retro-mistake, the Digital Frankenstein. :-)