Hi, Julie:
The decision of how to address the AN is always difficult, unless it is so large (as in my case) that surgery is the only immediate option.
Even without knowing the actual dimensions of your AN, I suspect that it's fairly small, so that certainly would make you a candidate for radiation. While radiation ('Gamma Knife') is non-invasive (no cutting) and relatively painless with a short recovery period, it carries it's own risks, including hearing loss and facial nerve complications. As I've previously stated, there simply are no guarantees with either surgery or radiation. The popular myth (especially with surgeons) that radiated tumors pose a more difficult challenge for removal surgery has pretty much been disproved over time. The risk of the radiated AN becoming malignant is infinitesimal. That radiation is less traumatic than surgery and very often successful is a reality. That it offers a more rapid recovery is also true. However, whether it's the right approach for you, Julie, I simply cannot say. It sure looks appealing.
I can't offer you any factual information about Dr. Chang or Stanford, as I live on the east coast and had my AN treated there - (Connecticut). I underwent 'retrosigmoid approach' surgery to debulk my AN, then 26 FSR treatments to kill it. As my 'signature' states; so far, so good. I had no facial complications and, like you, I had SSD prior to the surgery so hearing preservation was never a real issue for me. On the basis of my experience, I would say that surgery followed by radiation is a preferred approach, but if your AN is small, radiation alone (or surgery, alone) is probably preferable. It's your choice.
Frankly, if you're unimpressed with the doctor, find someone you're comfortable with and feel you can trust. This is a major decision and you must have full confidence in - not only your doctor - but your method of treatment.
Not sure I've clarified anything but I hope I've been a little help and of course, I wish you all the best as you continue to hash out a treatment/physician decision in the days to come.
Jim