I am traditionally a nitro racer, but am looking for something new, so I am converting a Losi 8ight buggy to electric. Having said that I do not know much about ESC, Motors, batteries or chargers. I have some questions.

What is a decent ESC for 1/8 that will take the abuse of racing? Are there any specific parameters for ESC to look for in this particular use? Volts? Amps? etc.

I have seen motors listed as kv. Is lower number = slower or less power?

Batteries- what is the C value as in 50C vs 60C? also what is 2s vs 4s? Is that the number of cells? How high of an amp rate can you charge a battery at? I ask as some chargers allow for higher amp charging. Which leads to my next question about chargers. Do I need a balancer? What is a balancer?
Thanks