do not purchase an hpi - other than the R40, as they are not a raceable vehicle. The NTC3 is a great entry level race car and can win races. The MTX3, Reflex, and Serpent 705 are also all great cars, better than the NTC3 - but a bit harder to tune and more money. Alot of engines are great out there, but i would strongly recommend only nova rossi based engines such as the following: RB Concepts, Sirio, Mugen, Novarossi, Novamega, ect