Soldato
Not really, a D700 was very similar to a D3 if you didn't need the large buffer, so for many people, the D700 was a better buy and would leave change to get some nice lenses.
Or the FPS, better weather sealing, vastly better battery performance...
The D600/D700 and D800 aren't comparable to the D3s/D3x/D4 series of cameras as they are designed for vastly different types of photography.
When I said buy the best you can afford, obviously that is within limits. I'm not saying sell your car to buy a D4 and an 800mm F4 lens...
Common sense really!