At the moment I have the guy at the Hobby centre trying to sell me the Traxxas Revo 3.3 or the Slayer Pro.

basically im on this site hoping someone can justify the $100 price jump from the Slayer Pro up to the Revo?
Is it worth the extra cash? Is it really that much better? Or is the slayer pro just as awesome?

Any tips/suggestions would be awesome! This is just for burning around local BMX track or dirt roads.