Back before kids, we bought subscription to the BSO and got to hear Symphony Hall acoustics, which are very nice. And really not a nad seat in the house.
Another great room is Jordan Hall and I like that place even more.
A more modern take is the Berklee Performance Center and the acoustics there are absolutely stunning although it's a smaller venue. Mostly amplified shows, but even straight, it's amazing.
Hurts like a bastid...