i'm looking to buy either one of these these lenses hopefully within the next month or so. relatively large price difference aside, what are the major differences between the two lenses? i know the 70-200 has an af motor where the 80-200 doesn't, but that isn't too big of a deal to me since i'll be using just for portaits. i've read a fair amount of reviews on this lens but am curious to see what you guys have to say. also, if any of you could post comparisons of the lenses shot wide open to compare the "bokeh" that would be appreciated.