I've been in need of a second body for some time. I've been using a D3s as my main and a D2hs as my 2nd but I just don't get the quality I want from the old D2hs. I've been waiting for a D400 for years like most of you but am getting an itch to get it replaced soon. My choices are D3, D3s, D3x, or a D800. I can get a D3 for about what I would expect a D400 to be priced new. Being I was wanting to get a bit more reach from my 400 2.8 I might step it up to the D3x or the D800. Another D3s is really not needed, a used D3x is cheaper.
I have seen some 40 x 60 inch images from a D3x that were beyond good.