Taking a cue from its four-wheeled cousins, BMW's top-of-the-line K1200 LT Elite is the first motorcycle with a built-in navigation system. You simply program the route in advance and the system continuously plots your location on a full-color map and dictates turn-by-turn directions through your helmet's speakers. (For safety, you can't make any changes after the bike begins moving.) In addition, you can store your favorite trip itineraries on a removable 64MB memory card, and there's even an internal database of hotels, restaurants, and gas stations from across the country. Price: $22,500, including all the software.