neu or mega

[U.L. HYDRO DRIVER ICE]

I have a 1/10 scale I m going to start racing soon should I go with a neu 1521 1860kv or

Mega 22/45/ which kv for mega also possible scorpion out runner motor 1900kv . I'm going to use a X442R or X447R .Will be running 4S with castle 240 LV