Len are you a nikon shooter? I really like that 200-400 F4 VR lens.. The d2x gives alot of flexibility with the crop mode. I shoot canon now but I dont have a pro body or 400mm+ glass. I did buy a 70-200 f4 L. And its worth every penny.. I havent invested alot of cash in canon yet so it would be easy for me to switch to nikon.