All 3 of those buggies are contenders. If it were me I would look at it like this. Parts support, do you have metric or standard tools, does the rc8 or jammin come with big bores? You definitely want the big bores, you will end up buying them later if they are not already there. If you dont have any standard wrenches or nut drivers be prepared to buy tools for the losi. As I said all 3 cars are good but they all have there own issues, I have had all 3. Good luck.