Richie,
Healthcare is just like any other business. They have a product to sell and they believe in it so they tell you that their product is the best. I think radiation is the way to go with AN's. Whether you pick GK, CK or Trilogy, I think that any one of those will fufill your purpose which is to not have brain surgery. The three options all have just about the same accuracy so it is up to your gut to make the call. This site is CK biased but there is nothing wrong with that. CK has marketed themselves really well. I did the research and spoke to many doctors before coming to my decision.
I spoke to one doctor and he told me that it is like picking a Dodge or a Chevy. They both provide the same service to you. It is just what you feel more comfortable with. I chose Trilogy because it felt right. The hardest part about this whole process is picking your treatment. Once you do that, I guarantee that you will sleep better. Good luck to you.
Cheers,
Craig