Most powerheads with the exception of Hydor Evolutions and Sicce Voyagers are not designed to be controlled, they cannot take the constant starts and stops. Hydor Evolutions have a rubber bump stop which forces the impeller to rotate in the correct direction and Voyagers have a non directional impeller so does not matter which way they rotate. I have owned both and preferred the Evolutions as they are much smaller, move more water in a better pattern, have a better mounting system and use less than half the power.
That being said, I switched to the new Jebao WP series a couple weeks ago and have been very pleased so far. They are DC powered pumps so can be variable speed and have a built in controller so no separate controller is needed and cost about the same as a bare Evo or Voyager which require a controller to do the same thing.