schulze 18.97kwf, 5s lipo, what motor

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is the neu more efficient because of the four pole setup or are they just more efficient motors? I am sick of doing things twice so i'll probably start with the neu, crazyjr and serum have done the learning the hard way for me, so now the question is: WHICH NEU MOTOR DO I RUN ON 5S LIPO IN A HALF ALUMINUM E-MAXX, MORE CONCERNED WITH POWER AND RUNTIME THAN SPEED

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affter all this i pretty much figure i need a neu 1515/2.5 but they are out of stock, ahhhhhhhhhhhhhhhhhhhhhhhhhhhh!!!!!!!!!!!!!!!!!! I WILL BE RUNNING 5S LIPO (18.5V) LIPO CAN I STEP UP TO THE 2200/KV NEU????