My youngest son and I went to the Madison Symphony's Christmas Spectacular, with the Madison Youth Choir, Symphony Choir, and the Handbell Choir as well. Overture Hall is very pretty, and the concert was great.
We were in the nosebleed seats (row M, third from the top), and it was rather curious to watch the tympanist hit his drum and hear the boom half a beat later (and hear it coming from center stage!). I could hear everything quite clearly, though.
They bathed the orchestra with blue light. The effect reminded me a bit of the ghosts in Lord of the Rings: probably not quite the associations they had in mind. My youngest likes organs, and loved the organ and handbell version of "Oh Tanenbaum." The tenor did a great job with "Oh Holy Night," one of my favorites. I wish I had the range to sing it myself.
A wonderful feature of the hall: there is a separate exit for the high altitude seats! Down 7 stories into the basement and out the back, without standing in line forever as the hundred rows in front of you slowly drain out.