best concert venue

The Greek Theater in Berkeley, California.

The Mondavi Arts Center at UC Davis (CA) is phenomenal.

And I still get the chills remembering the sound of the diva at the Kirov, in Leningrad (St. Petersburg). That is one humbling theater.

Kiev Philharmonic Concert Hall, Ukraine.
Only 500 seating. Choir sometimes is being placed on surrounding balcony while the orchestra is on the stage.
The stage is quite small as well. This venue is considered to be an ideal one for unamplified performance.
Another cool one that I realy like is Irridium Jazz Club where the most music you realy hear from the live instrument rather than it's amplified.

My choice is also Carnegie Hall...very "tube-like" sound.

Marakanetz, where is the Iridium Jazz Club? Keep the responses coming as the info is very useful for all of us when we travel.

For great analog sound – Concertgebouw, Amsterdam; the “old” Carnegie Hall; The Large Hall of the Tchaikovsky Conservatory (Bolshoi Sal); Mechanics Hall, Worcester, MA. (no joke!)

For digital sound – Anything built after 1950