I personally like Reedy and Trinity motors. I haven't tried the Orion or Peak motors. But from Reedy go with the KR and from Trinity- Cobalt, D6. If the track is tight use a flat wire, if open go with a round wire. (i believe thats right, say on trinitys site if im wrong). For the turns, if you have a good traction, go with a 10-12 turn and if its slippery go with a 13-14 (leaning more to a 14).