As stated previously, the push-pull 80-200, 2.8 AF-D and non D and the 2-ring are essentially the same lens optically. Although lenses, especially zooms will vary, and an older used model may have some slop, I wouldn't assume that you will be disappointed by the wide open performance of the 80-200. Wide open contrast is a bit lower than the 70-200s but resolution is generally high enough that PP can give you a satisfying image. I have had three push-pulls and two 2-rings and AF inconsistency was a bigger issue for me than lack of sharpness at f/2.8. I have compared my current 80-200, 2-ring, to a supposedly calibrated and adjusted 70-200 VRII and for my use the overall IQ differences were inconsistent and minor. As long as I can get texture in the subjects eyes, I consider the lens to be acceptably sharp. The 80-200 may very well be the lens for you, they are still a professional grade tool. Aloha.
