Forget hunting for Easter eggs; the gang at Reference Cinema & Sound will have guests hunting for speakers, which were painstakingly designed to match the existing woodwork or blend in with your antique furniture. For travelers, they'll create a CD-library hard drive that can be accessed from more than one house, leaving more room in your suitcase for those Jimmy Choos. These self-described perfectionists have completed projects in New York City, Connecticut, Westchester, and France. Want to check out their work (without hopping a flight to Orly)? The waiting area at Westchester BMW in White Plains keeps clients entertained with a Reference touch panel that lets them choose music or even browse the current line of vehicles.