The Ultimate would work fine. Part of the price is that it includes a seat.
I had an Ultimate installed for a year in a home that often had 40-50 people over. Some parties were 150.
I would say that it in fact, saw a lot of guest action.
There are many spray kits you can get that use the cold water supply that the toilet uses. It's just a matter of putting in a tee for the two supplies.