The Gulfstream G450 (912.965.3000, www.gulfstream.com), which entered service in 2005, descends from the popular GIV line, from which Gulfstream has delivered more than 500 jets worldwide. The $41 million G450 has a range of roughly 5,000 miles, a cruise speed of about 528 mph, and a 45-foot-long cabin that includes berthing for up to six passengers and seating for as many as 16. State-of-the-art systems provide 100 percent fresh air and keep the cabin quiet. Twelve big oval windows help create a light-filled, relaxed environment for those long trips. The optional executive seats (part of Gulfstream’s Elite interior package) are 27 inches wide and are equipped with telescoping headrests and heating and massage functions. Gulfstream has nine service centers in the United States and three more around the world to provide support for its aircraft.