I picked up a Nikon D750 last week and am very impressed. If anyone out there is on the fence about which full-frame Nikon to buy, they really should consider this camera. I agree with what I heard one of the senior guys from DP Review say that his D810 is going to spend a lot of time on the shelf now that he has a D750.
One thing I notice is that because this camera is comparatively light and compact, I am leaving the heavy zooms home and going back to my lighter primes which is actually fun. The combination makes a nice package to carry around.
John