best rafting in banff or kootenay?
 

Hello. I'll be traveling in the banff area at the end of June and I'm
looking to do some white water rafting in banff or kootenay. I hear
the Kootenary River and Kicking Horse River are quite good. I'm
looking for Class IV rapids, with the occasional class V rapid mixed
in on the trip. I probably only have time for a half day trip.

Can someone recommend a good company? Is Kicking Horse or Kootenay
better? Or are they pretty similar?

So, far I know of a couple places:
www.raftingtherockies.com
www.rafting.ca
www.wildwater.com

but, I don't know which of these are the best (and most responsible),
and I'd like something fairly challenging/adventurous.

Any recommendations would be appreciated. thanks!