1600F has always been plenty in my own application, and the Ecoboost engine/platform.
I can't recall, other than during the heat wave of last Summer, when temps were routinely in the 90's and 100's, that the EGT gauges (as I have two, one for bank one, and one for bank two) had ever eclipsed 1300F or beyond.
So 1600F provides enough "headroom" in our applications.
It is fun watching the needle move downwards to, during those times when WOT and the Methanol kicks in....
Entertaining.