Hey Marc, cool to see all these clips on youtube of you touring some really nice places like the Casals museum...
Just wondering, have you visited or are you planning to visit Eisenstadt, where Joseph Haydn used to live and work...if you haven't I think you should go down and tour the Esterhazy palace, a place where Haydn spent a large part of his life. It should be exciting in Eisenstadt this year, since this year marks the 200th year since the great composer left this world.
Since you're in Vienna now, there should be some Haydn-related activities there too. But popping down to Eisenstadt would be pretty cool too, if you have the time...=)
Have fun!