I look forward to seeing that post. My experience is similar - I came to the D600 from the D200, and while I like the D200 interface better, certainly the image quality of the D600 - dust and all - leaves the D200 in the dust - if I may be permitted that little word play. Truth is, I had to do some unnatural things to even find that the dust is there, and probably most pictures would not be noticed by anyone. But it is there, and I will want to get rid of it.
Thanks again for your perspective and look forward to seeing your more detailed post.