powerful esc and engine recommendation for 3 gps here with orange cube
It depends what your use-case is.
Is it multirotor, fixedwing, other ??
Check out ecalc https://www.ecalc.ch/ and you can use some features for free, or for a tiny subscription you can get full access to a category (or everything). For example the multirotor subscription is less then the price of a cheap prop, and can save you hundreds or thousands of $ in bad choices or guessing.
T-Motor U15Ⅱ KV80 motors with some APD UHV 28S ESC’s.
multirotor for rotary wing, and thank you for this website