Pick up a CO27 Pro and start learning to tune the motor. If you are new to electric, you have some studying to do. The Pro version is a bit more "tuned" and has the numbers posted for the motor, so buy the one with the "best" numbers you can find. The motor still needs to be "worked" in order to be competitive, however, since the sportsman drivers at SoCal have their motors working really well.
Get friendly with the sportsman guys in stock at SoCal and over time you will learn what you need.