Folks. Everywhere it's discussed, the gurus say, 'Hah! everything's the same but the VF is bigger and the lenses are dearer. OK, the 700 does a bit better at high ISO and that is your lot as far as 'better' is concerned!
I just got a D700 and I could not agree LESS!
The 700 has yet to take a bad pic. I gave it to my daughter ( no photo enthusiast) she gave it back and said 'This is too easy, can it take a bad pic?.
Can some knowledgable Nikonian put his (or her) into explaining why FX is so hot?