Hi all, i was wondering if there were any engine suggestions for my nitro RS4 3 Evo. I am familiar with rc cars EXCEPT for the nitro engine compatibility and fine points. The original HPI engine seems beat up pretty well in the used car i bought and i was hoping to replace the engine this month. I would like something with quite a bit of speed, but it doens't necessarily have to be the fastest thing in the planet. I really like the Team orion products as well as the O.S. 's (cause you can't really go wrong) but i have also heard that fantom engines are quite good. So i was just looking for a little friendly suggestion of what to get, or even guidelines to follow for choosing. Thanks!