cd -
definitely contact the ANA for their informational brochures - they're free and you'll find them very helpful.
AN treatment is pretty much a personal choice based on the size and location of the tumor. From the size of yours, both surgery and radiation should be options for you.
I was offered both options and ultimately chose surgery, but others choose radiation and find it's the right choice for them.
As Jim said, whether you lose your hearing or not from AN surgery pretty much depends on the surgical approach. It can also depend on what the doctors find when they "open" your head - MRIs only show so much. I chose retrosigmoid in the hopes of saving what hearing I had left in my AN ear, but my tumor was wrapped around my hearing nerve. In order to completely remove the tumor, my docs decided to "sacrifice" the hearing nerve. My neurologist and I had talked about this possibility prior to the surgery and he knew I'd be okay with the decision.
There are options available to those of us who end up SSD (single-sided deaf) - like the BAHA (bone anchored hearing aid), the TransEar, or just learning to adapt to hearing out of one ear. Once again, it's a personal choice. I have a BAHA and love it - but it's not everyone's choice.
Just keep in mind that there is life after an AN.
Best,
Jan