N said it best... 17-35 (superior to 17-55, sorry). 85 1.4 for portraits.70-200 2.8 VR for close sports. 300 2.8 VR for lacrosse, soccer, etc. The big 600 f4 for racing and wildlife. Don't forget the 50 1.2 for panos. I will still carry both the D300 AND the D700. Apples and oranges. I like having the choice.