I'm using a D3 (FX) and a D2x (DX). I occasionally use a D100 too. (It doesn't have a frame counter.)
The D3 is the primary camera; the D2x is a second body, used at the same time as the D3. That works out just fine, since they share remotes, eyepieces, batteries, chargers, etc. The control systems are very similar, although not quite identical.
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!