I came from a D90 with some DX lenses and wanted to upgrade to FX. So, after the D800 and, later, the D600 anouncements, i decided to go for an light used D700. The reasons were: D800 - too many pixels, too huge files, slow FPS and quite expensive (though i was able to get it); D600 - not so good built, quite small for my big hands, 39 AF points, button layout and the high ISO capability (good but not enought). My current setup is a D700 and a D90 when i want to go light. Started investing in FX lenses only and kept the excelent 16-85 DX and the 35 1.8 DX, for my Dx setup. I'm one of those that are planning to shoot with these setup for the next 5-10 years. The number of pixels is more than enough for me, and the results i get are quite sactisfying as well. Thinking like that, i have ZERO interest in the new D800/D600.
Nikonians!!! My best investment made after my camera!!!