Oh, what fortunate shopaholics, we! We don't have to live in New York City or Los Angeles or Las Vegas to be able to visit venerable American retailers such as Macy's, which has a flagship store at Dallas Galleria, or logo-laden Gianni Versace, Gucci and Louis Vuitton. Best of all, we gluttonous purveyors of platinum plastic have two--count 'em, two--Tiffany & Co. stores. Jewelers abound in Dallas, and each seems to have found its niche. We like the dirt-cheap yet fabulous sterling silver at Sam Moon. We love the jewelry department at Stanley Korshak at the Crescent, which always has the best of the hip designers--Tina Chow comes to mind. We swoon at the mostly artist-made baubles and bangles at Mark & Larry's Stuff. Still, for the real deal, the romance, the ambience, the little blue box, we'll spend what little we have left over at Tiffany's. The store's reputation for quality diamonds, staff expertise, platinum and sterling is second to none. A small gift selection, including sterling baby gifts and frou-frou ceramics, offers exquisite stuff. The best bling is pricey, of course, but you have an amazing selection of surprisingly affordable sterling silver jewelry, including rings, at Tiffany's.