COLLECTORS of art, antiques, textiles, and porcelain do so as much for the way they feel in the hand as for their look and history. Replacing the existing dark floors of this Summerour and Associates-designed residence in Atlanta with antique French oak boards was the first step toward bringing this client’s vision to life. Then came painting the walls a pearlized shade of white. These two broad strokes immediately established the rooms as perfect backdrops for the couple’s collections.