Surrounded by a few well-edited and suggestive elements, Miller blond and blue-eyed, and boyishly handsome sits smack in the center of the store at a simple table. (He prefers to handle sales himself, and when he must be outof town, he calls his father tostep in.) Walk into the store in the early-morning hours and chances are Miller will be there, sipping a coffee and poring over books of fabric suiting.