Whats the best chassis for racing?

[electric]

I'm going with X-ray just for quality. I probably get it through A main and get mikes conversion kit for it. What motor and ESC castle creations or? I had a neu 1y in my losi 8ight t but I sold it when I got out of the hobby for a while. I think castle bought neu so if I want one of those combos it would be the same as my old combo right? Which would be the best for racing? Also what brand batteries and what size? Thanks for all the help guys with answering my questions!
Wil