Hi Overcomer2,
You are so correct this is a wonderful community and it has helped me so much.
It does sound like your symptoms are really unpleasant! I suggest it may be a great choice to go for the MRI and prostatectomy, as it isn't the worst experience I have ever had. I am not medically trained, so can't speak with authority, but I am a great believer we should do all we can to have the best life we can. I was 64 when I had the operation and I did recover in about 6 months. My father was in his late 80s when he had an operation on his heart and it gave him a further 5 years of good-quality life before he finally left this life. I know he cherished those last years and would also be encouraging you if he were still here.
Whatever you chose to do; I wish you all the best and that you do get to be rid of the pain and discomfort.