Upload & Sell: Off
I did. I had a fairly unique situation - I was moving up to a pro body, so I needed to sell everything anyway (I was on crop). I decided to evaluate the entire system, plus the 1DX vs. D4.
I wanted to stay with Nikon, but rather than just arbitrarily make the call, I put together an Excel spreadsheet. I came up with a set of criteria, and weighted them according to how important they were to me. I then scored each one.
They were: ISO, Ergonomics, Ultrawides, General Purpose Glass, Long Glass, Autofocus, Framerate, Mount, Video, Control Design, and Flash System. I think there were a few more, but they escape me.
Based on the criteria that I came up with, I weighted, and I scored, it turned out the best decision was to switch to Canon.
I didn't like it at first, but I haven't looked back once.