So I am itching as usual for a different lens set up. I currently shoot with two Nikon D300s, 10.5DX, 17-55DX, 70-200VR, and 300EDII. I have been seeing a lot more 200-400VR lenses on the sidelines and was curious to see if anyone has any input on using this lens for sports. Ken Rockwell says "If you're shooting action, you want this 200-400." on his review of the lens... Anyone agree, disagree. Would anyone recommend selling my 300EDII to buy this lens at the end of football season. (I can't go more than a few days without telephoto a lens). Also, I am planning on selling one of my D300s in January to purchase a D3. Does anyone have comments on using this lens with a D3? Thank you for the input.