I am 35 years old and was diagnosed with a 2.6 cm AN last July. I was treated with Cyberknife in August 2007 and I can tell you that you will be fine. These first couple of weeks, as you get a handle on this diagnosis, are the worst.
The main treatment options out there are surgery or radiation, and I found that was the toughest decision to make. There are different radiation technologies to chose among as well, the most prevalent one being Gamma Knife (single dose). Cyberknife is a more recent technology that has certain advantages, such as better hearing preservation rates. I am sure you will hear and learn alot about these options in the next couple of weeks. The great news is that all treatment options have extremely high success rates. You also are fortunate (like me) in that because your tumor is relatively small, you will probably have all options available to you.
My main piece of advice is that you take your time and consult with multiple neurosurgeons before making any treatment decision. Ideally, you should consult with neurosurgeons who are skilled and experienced in both surgical and radiation approaches to ANs. I found that surgeons tend to be quite biased in favor of surgery and to discount the advantages of radiation, whereas doctors experienced in both radiation and surgery are more balanced about the advantages and disadvantages of each approach.
I am very happy to talk with you about my own process of researching treatment alternatives and coming to a treatment decision. Please feel free to contact me directly any time.