I like the detail in the second Bill, it's the stronger shot, but the first could be improved by getting rid of the rock on the left and adding a bit more space to the right - this is a bit messy as I wanted to keep your watermark in, but something along these lines maybe.
Mike
View attachment 74518
I really like the second one Bill.
I don't think I've seen any examples of the 300mm PF coupled with the D500 yet.
Would be an interesting combo
I thought about getting a D500 Wez ......... but I just do not think for my type of shots that you can beat the D810
I used the 300PF quite a lot with the D7200
what I find is that the D810 is more consistent and when cropped to the DX size I preferred it to the D7200 and as you have probably gathered I think that DX does not give you any more reach, It is just an elusion to say so as the DX sensor is just a crop of an FX sensor
I find the noise easy to control on the D810
Definitely for the static bird shots (that we're both fond of), I'd say the D810 wins hands down.
But the D500 is still really good at them. Overall though, I prefer the D500 (for what I shoot) because of the amazing AF system!