Well, I took the plunge and took delivery of the D4 yesterday. Spent most of the last 24 hours getting familiar with it and setting it up for sports photography. I had to do a firmware update which went flawlessly. I didn't have much problem selling the D800 and D300s. Shot #0002, my dog Sweetheart.
Sweetheart was rescued by my grandson when she was 6-7 weeks old and that was almost nine years ago. She's a German shepherd & husky mix. At least that's what we were told. Fitting that the first shots on my new D4 were of Sweetie.