Thanks for commenting Stephen, my first full frame camera was a Nikon D610, and my best friend until very recently was still using his D810. I shot on it a few times and it was always a joy to use (and great images). I also am under the impression that the Pentax K-1 uses the same sensor as the D810 just with some Pentax adjustments made to it (not a bad thing at all as I love Pentax/Ricoh colors and they had a great starting point with the D810)