i personally like orions the best, and think they run great, now for 1/12 i would probably go for a 9 or 10 turn depending on the track? if its bigger, go for maybe an 8, or if its small and techinal, try an 11 or 12. Team Checkpoint is also very good, most people say they are the best, and i wouldnt argue with that, i just personally like orion.