Appearances are a matter of personal taste, but I've had excellent results with the Velo-Orange headsets, both threaded and threadless. They have sealed bearings, which is a plus for me. Prices are very reasonable for a high quality headset. For a more traditional look, Campy Record headset are hard to beat, but will cost a bit more than the V-O models. Shimano Ultegra and Dura-Ace headsets are also excellent, but getting hard to find.