Hey, Brian. Enjoyed your post.
Don't try to put a pressure tank with a gravity bowl or visa versa. Won't work; one way will create a big mess, and the other way the water will just go "glug" and, for the most part, stay in the tank. There are a few (very few) good analytical articles around the web that show in detail the different engineering involved.
The original Toto Drake is available in a lot of places for an about-$200 price point. Given the quality of the unit, that seems like a fair price to me. We now have two. We will probably end up with more. (We also have a tonier Carlyle II, but the basic Drake would work fine for us in most applications.)
In the City, I have a rental apartment in a 490-unit high rise, built in the 80s. At time of construction, they installed AS Galleria lowboy toilets, which look cool and can't overflow. But their flush caused Maintenance to make nightly trips around the building with a snake and a plunger, so they have been replacing them as they turn over apartments. The initial replacement toilet was a Toto Drake, which the tenants universally-loved. But ownership had some aesthetic concerns because of the way the tiling and rough-in had been done for the Gallerias, so they switched to a Gerber, which management likes but which apparently has left many tenants nonplussed. Given this, I have left my Galleria in place, and tweaked it with the knowledge acquired from this site so that it does the job as along as one takes care to flush repeatedly at what I now intuitively-know to be the solids-limit (which isn't much). I'm only sorry that I didn't ask for a new toilet when they were installing the Drakes.