Wanting to know what the best engine for a Pilot 37.5% Yak would be as far as power 3D wise. Want to make sure I have the power to pull off any 3D manuever with authority. Just a couple specs from what I have seen so far.

DLE 170 is the best bargain with 17.5hp
Desert Aircraft 170 has 18 hp
3W competition series has 19.5 hp

Would it be worth the money to have 2 more hp any thoughts and opinions.