Hi geriw and welcome to this forum .....
None of us are trained medical professionals, but we collectively have many experiences that we can share with each other.
Since you live in California, you have many excellent medical facilities from which to choose, in close proximity. Stanford has an excellent reputation for Cyberknife treatment of ANs. House Ear Clinic and University of Southern California in Los Angeles have excellent reputations for surgical removal and/or radiation treatment.
It boils down to what is right for you.
The ANA has compiled lists of possible questions:
First, to yourself: http://www.anausa.org/index.php/overview/questions-to-ask-yourself
and secondly to physicians: http://www.anausa.org/index.php/overview/questions-for-treating-physician
I strongly suggest you look at these and then ask here on the forum about specific concerns.
Not to scare you, but I have had two surgeries to remove my acoustic neuroma and have virtually no ill effects from them (other than hearing loss), but I chose my physicians very carefully. Because the AN (vestibular schwannoma) grows on the balance branch of the auditory nerve, most patients must readjust to functioning with only one vestibular nerve, but it can be done. Many of us ultimately had to lose our hearing in the AN ear, but some do not. And, technology is in our favor these days with wonderful hearing assistance (other than traditional hearing aids).
Many thoughts and prayers for the decision-making part of your journey.