If you want a killer setup, take a lower kV and higher voltage to get some efficiency, example 1521 1Y or 1520 1Y with 5 or 6S.
An overkill motor like those 1520/1521 won't necessary break your drive train if you configure correctly you ESC (PUNCH CONTROL LOL !!!!) but will give you very nice cool temp and run times compare to higher kV and smaller 1515 1Y motor. this point counts a lot because the summer is coming :D.
A longer motor can always give you extra needer power if you require it one day, better to potentially have it instead need it !