Yes, they're calling the taller toilets "chair height" toilets. When you get as old as me it's a lot easier to stand up from a chair height toilet. People I know that have them say that everyone at their house gravitates to the bathroom with the chair height toilet. They're no more expensive than standard height toilets. They start at $99 at Lowes.
I've done two water main jobs during my life. I rented a trencher to do the digging, then used glued schedule 40 PVC pipe for the water main. I left the old pipe in the ground.
Something about the pressurized flush is unsettling to me. I don't have one but pressure flush toilets are common in hotels I frequent. I don't know exactly what bothers me about them. Maybe I'm just not accustomed to pressure flush.