Thanks for the reply. I am just starting out so I have nothing! I plan to buy batteries tomorrow. I just need to figure out which ones will be best for either kit. I understand that the RTR kits are not race ready. I just want to get my feet wet and I see no reason to do that with a $1000 set-up. I just want to make sure that whatever kit I end up with, I can get parts for it! And that I can run a decent battery (without worrying if I am going to fry the ESP) so I can get some driving time!