I wasn't suggesting that you should buy a D3100 or a D3200, just that if size and weight was the reason that you were moving on, that there were other options. If you are going to keep your D700 then all of your lenses would work with both cameras. Also, the thought of using adapters sounds like a total nightmare to me. Why would you want to do that? I think that the Oly and Panasonic 4/3 cameras look very "cute," but I bought a GF-1 and thought that the IQ was terrible. So, at least with a D3100 or D3200 all of the lenses would work just fine, you just wouldn't be able to autofocus with a couple of them, and if you have some really old lenses, you couldn't meter either, but that is the case with all of the adapters anyway. Maybe you should look at the V1, at least it uses your Nikkor lenses with the FT-1.