My understanding is that the radiation route is good for some people, but is generally not a viable way to save ultimate hearing. (although that may vary from case to case.) With surgery, you take initial risk of losing hearing, but it can be saved for some people. There are three surgical approaches, two of which can attempt to save hearing. generally speaking, the approach called "Middle Fossa" has the best hearing prevention outcomes, but this approach only works for smaller tumors and not as many doctors are familiar with it as the other approaches. REtrosigmoid approach also can save hearing. Translabyinth approach results is no hearing saved.
If I were you, I"d make sure to get an opinion from a doctor who can do multiple treatment options. Or at least ask him why he's recommending CK. Does the doctor also do surgery? If so, how often and what are his percentage outcomes, etc. T/hose are good questions to get answers to.