I was unable to control my lust, so I ordered a D850 today through NPS and I am told it will arrive in a couple of weeks. I currently own a D3S, a D810 and a D500. I shoot a lot of sports and wildlife and for those applications I used to use 2 D3S's. I intentionally skipped over the D4 and D5 since I love the hi ISO ability and fast f/p/s of the D3S. When the 810 came out, I bought one because of the additional mp's and the unbelievable resolution and used that for portraits, landscapes and other general photography. Never used it for moving subjects since the f/p/s couldn't keep up. When the D500 came out with its uncanny AF module and its even faster f/p/s rate, I sold one of the D3S's to buy the 500 and use D500 with the other D3S for moving subjects or when I want a physically smaller body. So here I am lusting after the 850 since it has the same remarkable AF as the D500 (and D5), advertised to have greater resolution and a whole slew of other modernizations over the D3S. I expect that the 850 will work both as a sports/wildlife camera (using the grip) and as an everyday body for other subjects. Originally planned to sell the D500 (which I do love for the above reasons, but is weaker at higher ISO than the D3S and the D810). My plan was to use the 850 and the D3S for moving subjects and the 850/810 combo for every day bodies. Now I am second guessing myself. The D3s is a terrific low light performer and despite having a slower AF than the 500, has provided me with thousands of sports/critter shots with its still not too shabby AF module. So now I am trying to decide whether to sell the D3S or the D500 to fund my new 850. The current D3S has a relatively low # of clicks on the shutter (it was my backup body when I had 2) and the D500 has very few clicks since it is pretty new and I did not use it much. I recognize that with the new 850, there is going to be a glut of D3S's and 500's out there and neither body is likely to yield what it might have a couple of months ago before the 850 hit. Am I missing anything in my thinking that might sway me one way or the other? Would prefer to hear from folks who have used the D3S and the D500. I was perfectly happy with my current gear and never really missed not having the 4 or the 5. Damn you Nikon for complicating my life.