Just a couple of questions.
1. Have you done this sort of thing before?
2. If "Yes" what camera did you use? If "no" what makes you think you can do it?
Think of it like this. I go to a gig. The pianist is crap. I think "I could play better than that". I go out, buy a piano and, with no experience, get on stage and prepare to play...
See where I'm going here? Dance videos are a specialized field (I know coz my missus does 'em) and it's not surprising that the local videographer didn't do a good job if it's his first go. Doesn't mean that you can buy a piano (or camcorder) and do any better.
I would suggest joining your local video society, going along for a few evenings and chatting to the members, seeing what gear they use and learning about videomaking before buying the gear.