Good questions, really Steve is the one to answer. As far as I can tell only Greg (Pale Rider) has reported owning one on the board. It's a good guess no one else of the forum members really has information that can help you.
As for the transformers, remember that the Torii is a power amp, and the Ultra is a preamp (albeit times three!). Different power and current requirements.
I'm sure the Ultra is an amazing machine, and I'd love to tinker with one. Maybe someday if i win the lottery! I don't do surround in any way. If I won the Lottery I'd have a room in my house for cinema and an Ultra, three Toriis and six ERRs. And maybe a sub, not sure.