Usually the Onza Rip come with Vee brakes front and rear, but HS-33's (hydrolic fluid brakes with vast amounts of power in comparison to standard vee brakes) just generally give a stronger bite to the rim so you have more chance of holding your wheel in that position without it slipping, because you dont really want to land on your arse haha.
You could expect to pay around 60 quid for a pair of HS-33's in the For Sale topic area, but i wouldnt invest and buy a set straight away, as you need to first learn the basics which is very easy with any brakes. If you have the money laying around/burning a hole then by all means, continue to post good topics and replies, and you can get yourself onto the Members Threads and starting buying produce of other members.