: I am interested in replacing my old water guzzling toilets with either the Toto Ultramax or Toto Ultimate.
: What's the difference in performance between the two models -- i.e. how much more "flush for the cash"
: do I get using the 3" instead of the 2" diameter flush valve? Also, how do these models compare with
: Gerber Ultraflush in terms of performance?

Both the Ultramax and Ultimate have 3" flush valves. The Ultramax has the added height flush valve. This boosts the power from class three to class four. I consider the Ultramax to be very similar to the air assist toilets. The money spent depends on the person. Some people use more paper than others.