i would only choose 1 of 2 routes to go, if you absolutely need a full frame right now, get a 5dmk3, its a great camera for right now, it's the only canon body i kept in the great gear massacre of 2015. if you can wait, then by all means start keeping an eye on the sony full frame a7mk2 and pending body updates, once they improve the focus tracking for moving subjects and the battery life, they're going to destroy canon and nikon market share. the bloodletting will be horrific. over on luminous landscape michael and kevin did about a 15 minute video looking at the latest in mirror less offerings, and at the end michael reichman looks right at the camera and tells canon and nikon, either get serious about this gear, or get made into a business school case study like kodak. as michael put it, if you won't eat your babies someone else will.