I just got back from a morning at the lake in my kayak. (Downloading as I write this) Whenever I am shooting birds and animals I use a D7000. I would be one who would consider a higher caliber DX.
I do hope they carry over the U1, U2 function from the D7000, I have U1 set for 1/1000 with floating auto ISO and single point focus. The U2 is 39 points and matrix evaluation on the autofocus. It is so easy to switch from one to the other.