I've had my D7k since late Oct. and right out of the box I charged the battery in my truck while on my way to some surfing spots.
Used Aperture priority and started shooting one of my surfers. I have to say that this is the best investment that I have made in a camera.
I've owned the D70,D40x,D50 and D60 and but I just love the image quality of the D7k right from of the start. Though I have found that I get better quality using prime lenses as with 16mp I can see things about my zooms that I could not with my other cameras. I always loved my 70-300 AF-S Vr II but I cant seem to get the descent images as I did with my D50-60. But I do have a 300mm af f/4 prime which is so much better then the zoom and crisper.
At first I thought that the images were too soft but after boosting sharping in camera and a little in LR3 they come out pretty good. And when shooting raw its even better.
But there is a learning curve as many on Nikonians will tell you. And I have much more to learn about this camera!
I tried the D80 too but like the D7k better.If you get it you will love it!