On the D3x glass question:
The 24-70 f2.8 is superb - among the best lenses I've ever owned or used.
The 105 macro (newish AF-S VR version) is also very good - I'll take the 24-70 over the 105 by a hair, but the latter is also a truly lovely lens.
I've never had much of a chance to use the 14-24 (don't own it yet), but it gets very, VERY high praise, including on the D3x.
The problem is with longer glass - the current 70-200 has a poor reputation on full frame, especially at high resolution, the (very old) 80-400 is worse. Most of us are hoping that the new 70-200 will solve the problems with the current one.
The little consumer 70-300 AF-S G VR is surprisingly decent, and is a commonly carried (I have one, and I've heard of several other D3x owners who do)stand-in until a better medium tele comes out).
From what I've heard, all the exotic teles (200-400, 300, 400, 500, 600) work very well on the D3x.
-Dan