Jason covered everything very well as the 7k does have many advantages. I went from a D70s and have produced what I believe are very sharp pictures and when you add great resolution and tone qualities it makes the 7k really jump. The only "out of focus" shots I've had have been user error - nothing to do with the camera's sensor or pixel size. We all should be working on improving our techniques and learning as we continue to shoot. When we do this our end results are better.
Nobody should seek his own good, but the good of others. <><