Only reason I'd buy the 810 is MP. I have the D750 and what bugs me is that the video autofocus is so loud, it makes this feature useless and therefore redundant because it spoils every footage if you leave in audio.

The tilt screen - I want a flip screen, not tilt!

I love the high dynamic range of the D750 and I even use it as a webcam for several hours. no problem. I wish though it would be a all in one camera