I have the justock 60a/17.5 combo. You can get it and the program card for less than $150. Free software download. Leaves a lot of money for a quality radio and steering servo. Which in my mind is equally important. A fast radio and servo.. is a tremendous difference maker for race results. Don't skimp on these. Plan on at least $300 for a good radio and servo.
Justock 17.5 combo