Summary: Well, the 80-400mm isn´t a lens for wildlife photos, because it isn´t sharp and the focus is too slow. I think that the Nikon should do a new one, further if the Nikon make a new one better than the oldest they will increase the number of new photograph with Nikon cameras. Why a think that? Here in Brazil, I heard many peolple say that went to Canon because of the 100-400mm.
Summary: I own many Nikkor Lenses and this is the only one with which I am disappointed. I have three major problems with the lens. First, the autofocus being outdated is very slow. Second, images exposed at 400mm and f/5.6 are extremely soft. I recently used the lens on my D90 to take many pictures of Big Horn Sheep and I could not believe how soft the images were. Third, the cost of the lens is much too high for the image quality produced.
Summary: I have owned this lens for about three months. I use it primarily on birds and other animals and it takes sharp photos if the light level is good. However, after using it in a cold environment (15-20 degrees F), the focus locked up and I had to send it for repair. Nikon requires the owner to pick up the shipping costs to send it to them, which was $35 for a lens this big.