I've heard nothing but good things about the Sicce Voyagers. They kind of look like shower heads though, but I have two of them in my 75 ready to go, got mine at aquacave. They're supposedly very quiet and no turn on/off issues.
Video showing flow:
[ame="http://www.youtube.com/watch?v=shwI3XkKgEo"]SICCE Voyager flow regulation - YouTube[/ame]