With regard to obsolescence, while I have new bodies, I continue to use my older ones side by side and sometimes instead of the new ones. My D2X is still used regularly even though I have been using it for over seven years now. It continues to work as well as it did the first day I bought it. While I use the newer bodies when I have to shoot at high ISO settings, in good light or when using flash, the old bodies perform very well. Good Luck and Enjoy your Nikons!