Here is a very long post somebody wrote about parsed defense statistics.
http://beastlords.org/index.php?topic=1944.0;wap2
There is a lot of stuff out there like this, you just have to weed through the ones that involve AA's and other things that obviously were not in Classic.
One interesting thing to note is that with all the threads about getting hit so often people keep referring to their AC but not their agility.
The link mentions that AC deals with how much damage you take but has nothing to do with avoidance. Agility is the only stat that effects how often you get hit. I'm sure everybody already knows this but nobody seems to be posting how much agility they have when they give examples.