When it comes to black tie, Rosen offers the comfort of classicism (one or two buttons, satin lapels) and the luxury of choice. You can play conservative with notched lapels and flap pockets, or go slightly edgy with a peaked lapel and slit pockets. For fashion notoriety, try a monochrome stripe in black and grey from Boss. Stock includes tuxedos by Armani, Collezioni ($2,295–$2,995), Boss, Zegna, Canali and, made exclusively for Harry Rosen, J. P. Tilford by Samuelsohn. For slightly less formal occasions, there’s an incomparable range of high-end suits.