Which wall mounted toilet will you recomend to buy.
If you have an existing wall hung toilet, with the standard brackets, then I would suggest the American Standard Glenwall.
It comes with the Sloan Flushmate, in an elongated bowl.
There aren't too many choices right now, the other woud be the Crane Rexmont gravity toilet, which is not as good.
If you are thinking of a new installation, then Duravit and Caroma make bowls that hang from the wall, and use an in-wall tank.