RotoFly main motor question
 

Hello all,
I have a Rotofly that I have had for quite a while. I enjoyed flying the helicopter once I replaced the tail rotor with something a little better. My question is, I have now burnt up my second main motor. I would like to replace it with something other than the stock as it doesn't seem to be much better than the stock tail motor was. I don't know anything about electrics, all my experience other than this heli has been nitro, helis and planes. I have searched quite a bit and quite honestly I get lost in most of the discussions. Could someone give me an small list of options for installing a different motor in heli. I don't want to change much else, I just use the heli to hover around my office on occasion and don't want to spend a ton of money on it. Thanks for any help!

Stan