O.K., so Nikon just now has these two new lenses out.........the 300mm f/4 AFS and the 80-400mm VR f/4.5-5.6. I have yet to see either lens but am wondering if anyone has seen them and/or tested them? Also, I've read some intitial user reports that the autofocus on the 80-400 is a bit slow because the lens lacks the AFS. I'd like some opinions on the pros and cons of each lens as it pertains to it's potential use as a hand-held bird-in-flight lens. When comparing the two lenses, keep in mind that you can use the TC14E with the 300mm f/4 and thereby have an effective 420mm f/5.6 AFS lens.