Having only just recently joined this forum, I only just saw this post now. But, yes, I was there. It was a stunning performance, with excellent and totally devoted contributions from all four soloists. Nicholas Isherwood had, of course, already performed it several times and Tristram Williams is a strong and very experienced advocate of Stockhausen's trumpet repertoire, Richard Haynes performed the part of Libra flawlessly and Tiffany duMochelle was spellbinding, and immensely powerful, in the part of Cancer. The venue was such that it was impossible to see all four soloists at once and they were so high above the audience that everyone's necks become pretty strained by the end, but that was a small price to pay! The new costumes were rather more medieval in style than the originals, but looked wonderful, each capturing something of the timelessness their characters. It was a a amazing experience for everyone - both for those who were hearing the work for the first time as for those who already knew it quite well.
At the Kürten courses in 2000 I had the opportunity to experience SIRIUS three times; it was unforgettable. I think the parts for the soloists are extremely demanding; so it is really a pity that such a production does not travel around the world. Performances of this work seem to be very very rare.
I feel that it could be useful to have a discussion-forum on the music of Stockhausen. There are so many people from all over the world, young and old, learned and eager to get into contact with this musical world: musicologists, composers, musicians, music lovers; people who plan concerts - who write books or have to give lectures and so on. So there should be much stuff, many ideas that we can share. And when we have open questions, there may be people who studied just that and could give a hint or a stimulus.
A problem might be the English language, but i feel that is the only possibility that many people who are interested can participate. And we can exercise tolerance to mistakes!