I love my Ox
Locker. You don't say which axle you're putting a
locker on or what kind of trails you'll be taking it on, but an Ox is hard to beat. The great thing about the Ox among the three you listed is that it's selectable--on when you need it, off when you don't. That's certainly an advantage when driving on pavement. I've had my Ox on my front axle for more than five years now, and had no problems out of it.