Thanks for the response!
I have seen an 80-200 used on a D90, but only briefly. It seemed at least comparable to my 55-200 in terms of speed, but the 55-200 does have more margin for error. You are definitely right about focus speed, but at least for now, my budget definitely eliminates the 70-200 as an option.
I don't mind not having VR for sports, I need to have a high shutter speed anyway. I'd really love to have f/2.8 and VR at the same time, but my budget won't let me
Anyway, as you might guess, budget is the number one problem. The older 80-200s seem to go for somewhere between 500 and 700 dollars around here. Are there any other sub $1000 lenses I can consider?