>I am glad to know that you have found the D800 to perform >well at ISO 3200. I thought that it was effectively pretty >much limited to 1600; however, I realize that what is >"acceptable" is subjective. 1600 is the maximum ISO >for my D200, and far better to leave it at 800.
My tolerance on the D200 is no more than ISO400. My tolerance on the D800 is ISO 3200. I find they have similar noise signatures at those settings.
>It is helpful to have the benefit of your experience. Permit >me one more question: In what way do you find the D600 to be >superior to the D800 for sports work?
Better noise performance than the D800, better frame rate. The D800's focusing is faster and more accurate though.