Buy a Toto (Japanese Made)!!! One Flush works every time with 1/2 the water as others.
If you interested in the most environmentally designed systems available, this might interest you, http://www.thenaturalhome.com/clivusmultrum.htm There is an entire office building designed around one of these systems in Maryland that was built about 15 years ago. The building used gray water technology and solar power to offset utility costs.
Actually, your TOTO commode was most likely built by TOTO USA, Inc. at its plant in Morrow, Georgia. I agree, though, they are extremely efficient.