Maxamps sells a lipo charger that is ac/dc, incase you are looking later.
If you want to race, and your tracks are running electric, then that is what you are running. I am not sure where they are, but noise is a big factor, especially with 20 buggies revving.
Since you might race, visit your local tracks, and talk to Different people, and find out what they are running. You dont need to choose the most popular car, but it might be the one that is locally supported by your hobby shops, and it is also nice to know you can bring cash to a race and buy parts. I hate waiting days/weeks for parts, I want them now, since my time is limited.
A racing buggy is not always the best backyard basher, they don't have the ground clearance and big tires of a monster truck. Things like that, you will have to consider.