The Chris King is the Rolex of headsets. Sure other headsets turn, but they don't have the precision machining, green manufacturing processes, fair labor practices, warrantee (10 years covering EVERYTHING! You could return it for a different color simply because you changed your mind) nor half the reputation for quality that a Chris King has. I personally know people who have transferred their King five times as they purchased new bikes.
From personal experience NOTHING tops a King
It's like a Thomson seatpost or a Fox fork - simply the best there is