Wow... what i would suggust to you is to do some google searches. Go to the company's websites (Hpiracing.com, Teamassociated.com ect) and read on them. As for what they cost, check Towerhobbies.com Its not what the car can do, its what you do with the car. Cause i can make a belt drive perform better then a shaft drive, but it has drawbacks. And viseversa.