Not a pilot or navigator of any air or water vessel, in fact when I'm not desk diving, the only thing I navigate are the Chicago streets in my vintage E36. But, it seems rather cool to have slide rule bezel right on your wrist. This "cool factor" has superseded my need for a GMT/24-hour watch and I started to delve into these 3 models/lines.
As of now, the manual Speedmaster Professional looks the most attractive. The second in line would be the Navitimer with the GMT hand, but yes, at 3x to 5x more than the Speedy Pro.
Your picks and opinions would be appreciated; moreover, please suggest any other unique pieces.