The Marchetti is definately my favorite FSX aircraft for touring. It features excellent ****pit visibility, decent range, and a nice cruise speed all in a highly aerobatic package.
That thing is fun to fly east through the Grand Canyon, departing from Las Vegas at 6am. The bump mapping on it's wings is just beautiful at dusk and dawn.
Air Combat USA
uses them, and some militaries use them as trainers. I'd love to take some of those AC classes.