You really need to be more specific. 1/10 scale short course is a popular race class. Then it's 2wd or 4x4. 2wd is cheaper, but much more difficult to do. 4x4 usually uses a more powerful motor which is a bit more expensive and the car itself is more expensive. I personally use a Losi. THey are heavy and fast. You don't get pushed around with them. But that's my opinion and asking which is best is like asking who is the better band. You're going to get 20 different answers. The top ones are Losi, Team Associated and Teckno. They are really fast, heavy and kick my Losi's butt, but they are expensive. If you are going to race, stay away from Traxxas. They are tough, easy to work on but not really competitive racers. They are more for bashing.