With Nikon bringing out full frame on the D700 how long do you think it will take before full frame will dribble down to D300 series and eventually whatever the D80 will be called? Do you think DX lenses will be obsolete within 10 years? What do you think a D700 will be worth 2 years from now? I am asking these questions for future lens planning purposes. If a D700 will be worth $1500 in a couple of years maybe I'll stop buying DX lenses.