Correct me if I'm wrong, but wouldn't I then also need a threadless headset? It's hard to have beef with the Dura-Ace threaded headset...

Another question, does a threaded fork have threads the whole way up the steerer tube? I didn't think it did, but I don't have a bike here to check. (This is what happens when all the bikes you own are 1 1/8" threadless to begin with.)