Answer:
Traxxas Stampede
The Stampede is a monster truck, more for offroading. It will not go as fast at the Rustler (around 5-10mph difference) but is still a very good truck. Stampede is one of the best truck to start with.
Traxxas Rustler
The Rustler is like a hybrid, it can go offroad and onroad. You can set it up with onroad tires and adjust the suspension setup to your liking. It's very versitile and light. It also very wide so it will not flip over through sharp corners like the Stampede may.