American Standard is the Yorkville and it's a "Pressure Assisted" toilet so good flush but noisy. 4" floor to center of waste
Duravit Happy D, i have sold 4 last year and 3 this year and have positive feedback. 7-1/8" floor to center of waste
Crane Ecomiser 3837(elongated) comes in Regular or Elongated and also in Dual-Flush. 4-1/8" floor to center of waste.
Gerber Ultra Flush Regualr/Elongated Gravity/Pressure Assited. 4-1/4" floor to center of waste