I just have done microsurgery for my 12 mm AN by Dr. Efron at Redwood City Kaiser last week. If you would like to do CK, I guess Dr. Tse will care about you.
Anyway all three doctors will tell you about each option and treatment procedure. Dr. Efron and Dr. Kung are neuro/ENT surgeons who will do operation together if you go for microsurgery. I think they are a great team. My surgery went very well.
Regarding your symptoms, it is very likely your tinnitus and hearing loss is caused by your 23 mm AN. 23 mm is not a small size. Keep in mind that CK doesn't remove it but just prevent its growth.