Considering the D700 but wonder worth spending on the $3500 body?
I do lots of Macros , getting Full Frame means my Macros won't be as close to the object?
The 18-200VR that I have is very useful when it comes to travel ,on full frame there isn't an equivalent. I find it very usefull when I take parades as the 200mm = 300mm on a DX.
My friend who bought a 5D Mark II said that pictures taken are worst than his 40D because Full Frame cameras have more noise & in terms of picture quality , there is no improvement.