The images coming out of the D700 are so malleable and pleasing to work on. I push them, I pull them, I selectively brighten and darken them, I even crop heavily on occasion. All very workable in PP. this is why my D700 is my main camera and my D7000 and D300 play more specific roles.
For me it's the results of the D700 that stand out, and I dont consider the VF a factor and I don't mind the DX FOV. And i prefer the DX AF point spread over FX.
Even the D7000, which is very good in its own right, does not have this same ease in processing. If a DX camera ever matches a D700 in these regards then the story would be different for me because DX also has size and weight and cost advantages as well as macro and wildlife advantages.
One other good advantage I almost never need to do with my D700 is noise reduction. because of all this I plan to convert my kit from two DX and one FX cameras to the other way around.