I heard about Carnegie Hall ... just wasn't sure it's up to snuff
Bear in mind my interest in classical music is very recent barely a year old
(The following is based on limited experiences, from many years ago, and usually from the nosebleed seats, so I apologize if things are different today.) I've been to Carnegie, Avery Fisher, and the Met. The latter two of course are part of Lincoln Center, which is very large with many institutions, including Juilliard. The Met is easily the most pretentious concert hall I have been to in my life, there is no second place. No subtitles for opera either, at least at the time, you know even Sydney does subtitles. I did hear a pretty entertaining tidbit from Kal Rubinson regarding that hall, and that is that there is a theory that it sounded better, more live, in the olden days . . . when . . . all the ladies had very, very low necklines to show off their apparently sound-reflective bosoms!
First of all, don't base your decision on the venue, but the act. It might sound obvious, but I have to say that. If you don't know what you like yet, well, I guess I could give you my opinion if you link me the schedule(s). Better yet is to find what you really enjoy yourself of course, and then look for that on the programming schedules.
That said, of the above, go to Carnegie. It is more intimate, decorative, and more "live" in sound. Avery Fisher is more somber, very wide comparatively.
I remember seeing the (conductor-less) Orpheus Chamber Orchestra play at Carnegie, and I remember remarking from the balcony above the cello section, how it was apparent their
pizzicati were choreographed (something I never even heard of before or since, but wth do I know). Dumb story, but wanted to share that bit.
Also, in my limited experiences, closer is not always better; in the opinions of some pro musicans I have spoken with, it's typically closer to the rear of whichever lesser known hall we were speaking of that it sounded best. This is admittedly anecdotal, but I haven't yet heard anyone say that the opposite is true.
A tip for you (if things haven't changed) is that you can go sit in on the open rehearsals at Carnegie Hall for dirt cheap. They'll tape off so many rows, I dunno, say a dozen(?), and it's obviously not a performance, but at least you can check out how it sounds with pro musicians in there for very cheap. If you are more fortunate than I am, you will have an English speaking ensemble in there. Because what I remember of some Eastern European orchestra practicing in there, it went something like:
Blah blah blah dolcissimo blah blah. Blah blah?! Blah blah blah molto allegro blah. Blah? Blah blah fortissimo blah BLAH. BLAH! BLAH!