WOW!!! I am blown away with my test shots in the back yard. I'm so happy I made the decision to buy the D600. The colors and clarity are spectacular. I grumbled at first about the placement of the controls on the camera since they are so different from the D200, but I'm over that already due to my overall joy with the quality of the images. Also like that nice big, sharp monitor on the back. Anxious to get out tomorrow and take some more interesting shots.
Thanks for the comments. They helped me with my decision to buy it.