Here's a wall-hung that flushes very well, and works with the Geberit in-wall tank as well as the Toto in-wall tank.
And here's another:
I love Phillippe Starck. Been to the club he designed in Dallas (featured in "RoboCop"). Stayed in the Paramount Hotel when he refurbished it. Have one of his toothbrushes, as well as a bunch of his nick-nacks. Not a fan of his toilet, though. Have 3 wall-hungs in our beach house. The Toto wall-hungs that were installed at our club recently perform flawlessly.
And for what it's worth, here are the Toto bidets, if you don't want to mix and match brands. Some are part of suites with Toto toilets, but not with any wall hungs.
Figure actual price is 30-40 percent off of list price.