I am looking at getting either one of these lenses. Other than the VR capabilities on the 70-200, is the 70-200 really worth approx $700.00 more than the 80-200? I will use the lens for outdoor action/sports shots. Cost is a serious consideration for me as I am on a tight budget. How does the 80-400 VR compare image quality to either of these lenses. I have read that the focus speed on the 80-400 is very slow. Also how does the focus speed of the 80-200 D lens compare to the 80-200 AFS lens? Any help and advice would be appreciated.