I voted A7S. Even though I'm a Canon user the possibilities of that camera seem very intriguing. As a bonus, one can adapt almost anything to it - so, again, it may have the broadest appeal of the options listed.
From a practical standpoint, Canon EOS 7D II would've been the most interesting, but I already have a backup camera - a 650D.
From a practical standpoint, Canon EOS 7D II would've been the most interesting, but I already have a backup camera - a 650D.