I've had my car repaired twice after hailstorms, first by Dent Boss (
http://dentboss.com/) and then by Dent Force (
http://www.dentforce.ca/). I'd say both were equally competent, although I didn't really look hard at pricing since insurance took care of it. If I had to guess, Dent Boss would be the cheaper one cause they're a bit smaller shop. They also did my Mazda's door (a ridiculously common dent a few years ago) for about $200, but that was a good 5 inches across.