Hi Abonillo,
I was 27 when diagnosed, so all of the specialists I saw only recommended surgery due to my young age. As you mentioned, they do not know what the effects of radiation will be in a few years, so it was basically out of the question for me. Although I didn't really have a choice, I liked the idea of surgery because I could get the tumor removed and move on with my life. I know only have to get an MRI every 5 years, but other than that, I am living my life completely normally and worry-free.
My advice would be to see as many specialists as you can, until you can make a decision that feels right for you. Make sure to seek the advice of specialists who are very experienced with AN. Have you sent your MRI to House for a free consult?
https://www.houseclinic.com/consultation/acousticneuroma . I would highly recommend hearing what they have to say, no matter which option you are leaning towards. I believe other clinics provide the same service as well (USC, Stanford).
As far as surgery goes - yes, there is hope to save your hearing. I only had very minor hearing loss pre-op, and my hearing has not changed a bit post-op! It depends what approach you are a candidate for. I had Middle Fossa which has a higher chance of saving your hearing, but I believe it is around 50/50 for retro-sigmoid? And yes - you will be ok after this. I am now 2 years post-op and it is very rare that I even remember that I had a brain tumor and surgery.
~Michelle