I've owned a Toto Ultramax, elongated G-Max with Sanagloss for 5 years. Never any problems. Added an Ultramax II a couple weeks ago, It has the same features with comfort height and has worked fine thus far and is noticably quieter.

Like the comfort height.

Toto builds quality products so I would not be concerned about longevity and parts should be available through any plumber.

My parents have a Drake with the dual cyclone. I think it's a pretty slick concept and it works well.

They also have an Ultramax, and we have an Ultimate and a G-Max Drake, too.

Our Ultimate is the only one of the bunch I've had complaints about. It does its best when you flush and hold the lever down until the trap glugs as the last of the water goes out. If you aren't mindful and forget to do that, it clogs in a heartbeat.

The only differentiator I could come up with (beyond the flush system) is that the low profile one-piece toilets just don't have as much water head in the tank as the taller Drakes.

thanks for your responses...
i did write to terry love and he preferred the ultramx II dual cyclone flush, but did not state why, although i asked. so not sure what's up with that..

fyi: terry love has his own plumbing website..terrylove.com

thanks again, probably going with ultramax II, but did not order yet..