RE: Traxxas brusless motor?
You will enjoy the VXL kit if you plan on running 2s and 3s lipo's. The 2s are fun to bash around the yard and normal running the put in the 3s when you want crazy speed and uncontrolable power.
What kind of batteries and charger do you already have? It's easier and cheaper to match up a brushless kit to what you've already got unless you plan on spending alot of money and buying everything at once.