Hi again,

If you've narrowed it down to the D3 or the D300, you might as well go with the D3. As far as controls, there really is little difference between the two, the D3 isn't any "harder" to use than than the D300, and you get quite a bit more "built-in" performance.

Have you gone to a camera store and actually held each of them? The best camera in the world won't do you any good if you aren't comfortable holding it.

Take a flash card with and shoot a few frames of with each. (If your store won't let you, find one that will).