Otto-- I haven't heard the new tsunami equipped version but I am fairly pleased with the sound. Good bell and, as you said, a nice throaty whistle. Steam chuffs get a little "muddy" at speed but then again so does the real thing.
The local PBS station is sending a producer/reporter over tomorrow to view the layout in hopes of doing a half hour segment so I wanted to have sound on everything that I will operate for them. My strong suit is structure building but that doesn't make for very interesting TV