If you plan on racing at any big events, some of the cheaper sensorless systems/combos (like the Mamba Sidewinder), while excellent performing, aren't ROAR legal for stock classes. Just about any of the big names like Novak, Tekin, LRP, Speedpassion, etc., make decent ESCs. Good motors are Novak, Tekin, LRP, Hacker, Losi, Trinity, Speedpassion, and Orion.
*** The Gate - Celebrating 7 years at the same location ***
The difference between genius and stupidity is that genius has its limits. - Albert Einstein
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car