You should know!!! I have gotten some awesome pictures with the 50/1.4
After reviewing my shots, I probably could have gotten better pics with the 50. I had no idea where we would be sitting but as it turned out, the 50 would have been useful.
Of course you would keep the $6,500 camera. What was I thinking? Lol
So, have you decided what body to get? Sure, I'd keep the D5, but the D500 is sweet. The D810 is my go to for studio, portrait and landscape. My D500 sometimes is my point-n-shoot with a 20/2.8D and NO grip -- awesome setup!