The R40!
More adjustability, lower CG, better overall performance!
The RS4 SS and Evo are basically the same car. If you must choose between these 2 I would go with the SS. That way you can add your own electronics instead of the RTR servos you'll get with the Evo. Plus the EVO .15 probably won't be legal at most racetracks. I have an RS4-3 that has alot of hop-ups and it's still not as adjustable as my stock NTC3. If you want to stick with HPI and be competative I would go with the R40. It might cost a little more to get running at first, but you'll thank yourself in the long run.
