THESE TWO KNOW WHAT YOU NEED… they promise. The couple, once dubbed the “fashion-retail dream team,” met in their early 20s in New York, when Sid worked for Ralph Lauren and Lands’ End and Ann was an editor at Vogue and Glamour. In the years since, they’ve launched Sid Mashburn, a men’s store; Ann Mashburn, a women’s store; and, most recently, Mashburn, a bright, airy concept shop in Atlanta selling everything from baby clothes to home accessories. Shopping at one of their stores (whether at the flagship Atlanta locations or in Dallas, Houston, D.C., or LA) is like going to a bookstore that has been stocked by your most well-read friend: only the best and most interesting titles allowed—no filler. The stores, which sell clothing from the Sid and Ann…