Mansfield Quantum One - wall mount replacement?

I am looking for a low flow replacement for an old wall mount toilet in my house, and have seen the posts on the American Standard Glenwall and Crane Rexmont. On the Mansfield website, I also found the Mansfield Quantum One 144-153, which is a 1.0 gpf with Flushmate IV. The specs looks like it would fit the existing carrier for my wall mount toilet. Any thoughts or comments about this Mansfield would be appreciated.

http://mansfieldplumbing.com/v3/pdf/144-154.pdf

http://mansfieldplumbing.com/v3/pc-template12.jsp?item=135&cat=326

Consumer Report on toilets, the ones that work!

I would go Mansfield over American Standard.
Crane is not a pressure assist so you don't have the noise, but you also loose the flush.
Mansfield shows a 900 on the Map test.
I have not heard any bad things about Mansfield.

If you are buying a wall hung toilet

Crane Rexmont (Not recommended)

American Standard Glenwall, This works well.

Mansfield, Not enough information at this time.

The 1.0 gallon Flushmate works well enough with their other bowls.
I've had some troubles with sealing and have had a little leakage that comes and goes.

The EcoFlush dual flush pressure tank is not recommended.