Thanks so much for all the advice!
I went to my daughter's practice last night where I played around some. I was in manual mode :
iso: 1600
shutter speed: 1/400
Metering Mode : centerweighted
AF Mode : AI Servo AF
Av : tried to set at 3.5, but would change when I played with the lens.
So, then I switched over to Av priority and got some better results. It was dark out and they only had every other light on. I noticed that in Av priority, the shutter speeds were slower so that was what helped the brightness.
I think I may invest at first in the 85mm f1.8.
I'll play around at the meet tonight and see what I get.
I've seen people mention that you can rent lens . . . how do you find out in your local area who does?

