The size that suits me best is the Grand Auditorium size on Taylor's _14 series guitars. The body width is the same as a dreadnought, but the waist is more narrow, and the body feels like it may a little thinner. My 614CE has a maple back & sides with a spruce top, and has a full sound without being too "booming". Perfect for plugged in performances, and cuts through the sound in unamplified picking circles, too. (That being said, if I can find a 615 Jumbo cutaway, I might consider the step up in size.)