I love the look of the Toto Guinevere and terry has rated it highly, but it's so costly. I can live with the look of the Eco Clayton, but Terry hasn't rated it and I'm not sure about the flush system. The Drake II is highly rated and apparently has same flush system as the Guinevere, but I don't like the look as much as the Clayton. Any feedback on the Clayton? I'm building a house and the builder wants to use Mansfield Alto 135.16 but i've read bad things in this forum. Any other alternatives? Thanks!