I have a D300 and am strictly DX at this time. I'm waiting for the D400 to come out to make up my mind whether I go that way or add FX with a D800. If the D400 takes too much more time to arrive, I may just go for the D800. I always knew and still feel that I would eventually wind up with an FX camera and never bought any DX lenses. It's just a matter of time.