>Ok, now to lenses. My biggest gripe was at the wide end.
The reason why I switched from DX to FX about four years ago was the extraordinary Nikon 14-24/2.8 lens. This lens on the D700 has opened a completely new field of photography for me. The D700 is an outstanding camera and I personally see no need to switch to the new D600/D800 models - don't know whether this will help you deciding.