My kit would only bring me around $1400, assuming I'd even get that much. I don't do any low light shooting. I mostly do portraits and macro. The D7000 is quite capable of handling those duties, so I am not out in the cold there.
I do have several FX lenses so if and when the time comes to move into FX, I at least have some glass to work with. I am not holding my breath though. Not entirely convinced I really need FX. I just like the handling and full frame viewfinder of the D600.