A Museum will be for best vocals, but i would strongly recommend DOME TOUR 2001.
Cos' DOME TOUR 2001, is the most fantastic, magnificent, GRAND, majestic, spectacular and breathtaking concert ayu ever had. Go watch it! You will not regret it, and her vocals in the concert were good as well. Its excellent!!
Here's a review given to this concert:
DOME TOUR 2001 Review