After much research and agonizing I'm down to deciding between the Caroma Caravelle 305 Dual Flush 1.6/0.8 Gpf and the Toto Eco Drake CST744E with the single 1.28 Gpf. From what I've read, the smaller water spot on the Caravelle may necessitate a second flush (and brush clean) which will defeat it's water saving purposes. I've also heard that the Drake is very efficient and powerful and one flush will handle anything. My main concern is the water savings. I have two kids and a "clean toilet" fanatical wife. Any help with making this decision would be appreciated.