I recentlyl purchased the AF160FC to replace my AF080C. It's a keeper. It's caused me to switch Macro lenses but I'm happy with the results.
Previously I generally used a 50mm macro because it was easier to get the exposure where I wanted it, and if you got to disanct the 080 ran out of horsepower. the 160 has pretty much inspired me to mostly use the FA100 Macro. the latter is more convenient for many things because
you can get a bit further away from your subject. That is a big help when you are trying to shoot a spider in his web as in the photo that follows.
<click photo to enlarge to full screen>