I would stay with the stock stuff till you wreak it a few times. A guy in our club has a brushless Corona, it is about the most durable helicopter I have EVER seen! He will smash the "crud" out of it, unfold the blades and straighten the boom. He is back flying!

I am sure you saw this set up but here you go anyway:
http://www.helihobby.com/html/corona_heli_kits.html