The profiles match those set in the camera, so I suppose it depends which you prefer.
I use D2x mode 1 as the default on import (I have a preset) for my D70 files, but that's because I want good skin tones.
Apparently...
D2X mode 1 is for skin tones
D2X mode 2 is for extensive post-processing
D2X mode 3 is for landscapes and stuff