As others have mentioned, it really depends on what you're trying to get into. I'd really think hard about that part, as RTR kits can get pretty pricey. If you're ok with online shopping, you can get parts for pretty much anything. If you want local hobby store support, visit one and see what they stack.

Do you want to race or bash?
What's your price range for JUST the car?

We can talk about Lipos and charges and all the good stuff after