The rumors are flying. The sophisticated and palatial Dallas landmark-- stacked with awards and with a devoted international following-- is on the market. And this posh icon shouldn't have any trouble attracting a buyer. The Mobil five-star and AAA five-diamond award winner has been distinguished as the top U.S. hotel by Zagat and the world's best hotel service by Travel and Leisure. Rosewood's Mansion on Turtle Creek is the only five-star hotel in Texas, and the management intends to keep it that way: continuing its role operating the property after the new buyer is found. Besides this stellar service and other-worldly cuisine, the hotel features a world-class spa, fitness center and pool.