When you're shopping for a 5'7" grand piano, you're likely looking for that perfect balance of power and expressive detail. The Ritmüller GH170R and the Kawai GL-30 both hit this size mark but offer two very different ways to get there. While the Ritmüller GH170R designed by European master Lothar Thomma—aims for a "boutique" soul., the Kawai is famous for its high-tech Millennium III carbon-fiber action and modern Japanese precision