After some research I determined that the Koehler Archer 60 x 32 offered a good compromise for soaking and showering. I think it is around 20 inches high, but the overflow is positioned unusually high allowing a deeper fill for the size. It is acrylic and fairly inexpensive with a tile-in flange. If you purchase it make sure you get the special drain kit for the unit as it is not a universal design.
Q