I just saw in my local plumbing store a new dual-flush (.8-gal, 1.6-gal) toilet from Sterling (a Kohler brand). It's called "Rockport." It's made in Thailand.
(Map testing is 300 to 325 grams)
I thought I had decided on a Caroma dual-flush, but this is a lot cheaper at $230. Does anyone know anything about this toilet and its performance? It looks a lot like the Caroma, with a steep-sided, washdown-type bowl, except the flush mechanism seems to be smaller and perhaps less sturdy.
I found this link on the toilet: http://www.sterlingplumbing.com/rockton_dual.html
All the best,