More and more doctors are recommending radiation instead of surgery regardless of age, as there are less risks (especially to the hearing and facial nerves) and far less recovery time with radiation. That said, the choice of treatment is a very personal matter.
The best course of action is for you to get opinions from three or more doctors who (collectively) practice neurosurgery, GK, CK and "regular" FSR. They'll all have their biases, but you might discover a prevailing, if not unanimous, opinion in their responses. Listen to what each has to say. Weigh the risks vs benefits of each approach. By the time you've received three or four (or more) qualified opinions, you will probably have a strong gut feeling on which type of treatment you want. I got six opinions! A lot, yes, but by the time I got the 6th one, I was already crystal-clear about what treatment I wanted. That peace of mind was invaluable to me.
Several doctors offer free review of your MRI and other tests and a consultation (either written response or via a personal phone call to you):
Dr. Steven Chang (my doctor) at Stanford Univ Medical Center (the facility with the most experience with CK) is both a neurosurgeon and a CyberKnife practitioner. He will review your case for free. His email address is: email@example.com.
Dr. Derald Brackmann at House Ear Clinic (California) will also give you a free consultation. Many people see House Ear as biased toward neurosurgery, yet Dr. Brackmann recommended I get radiation (specifically GK, but I chose CK instead) once I stressed to him that hearing preservation was vitally important to me. Make sure you explain your goals and concerns thoroughly with every doctor you consult with, as that may influence their recommendation.
Univ of Pittsburgh also gives free consultations; they are the most experienced facility for GK in the US.
Good luck and remember: you are the boss. It's your body, your decision. Take your time. Research your options thoroughly. Then follow your gut instinct. You'll come through just fine, with no regrets.