@BGreen, showing my dinosaur status here.
A couple of years ago it seemed like some cameras worked better if you were on a PC, versus and Apple platform. I'm guess that's not the case now? Everything now works with an iPad, Sprongo, Coaches Eye, Dartfish, etc.? So regardless of the camera, it's going to work on your iPad, or iPhone with a variety of apps?
Agree with the comments. Autofocus, battery life, size. And the ability to work it with a light glove liner on your hand, if you're filming in the real cold.
Panasonic and Sony do work, that's pretty consistent I hear. Have a couple of family coaches who have had Canon issues, too. I know one pretty serious coach who sure isn't spending more than $500 on his camera. I do know that he carries a spare charged battery, too.