Obviously I'm going to be a bit biased, but I think Chicago would be a great location for a concert event. It's been the site for numerous concert premiers in the past (Dear Friends, Distant Worlds, Play!) But I agree in that there needs to be at least two runs, east and west coast probably, with possibly a third in the middle somewhere?
Also- I think I speak for everyone when I say Iwould absolutely love to see a CD with these orchestrated tracks on them.
On a side note... you could totally have a concert as part of some type of bigger event... fanfest /cough