Sounds like mine. I am a G 4+5, but did not have issues in lymph nodes or Seminal vesticles. Multiple surgeons felt like they had a chance of controlling the cancer for a time (no one promised a cure).
I got the "great results, you will be cured" pitch from multiple Radiation Oncologists, but none offered better than 70% success when pressured. 70% in my world is far worse than the most abysmal failure, and gets no acknowledgement from me.
There is a trade off. With surgery (as I chose) there are guaranteed issues (short or long term varies, mine are long term) with ED and incontinence. RT may have less side effects short term, but can have ED issues years down the line.
I chose DaVinci surgery, followed by the same radiation that was supposed to save me all by itself. The two together did not accomplish the promised results, and I am off to the oncologists yet again.
Get multiple opinions from doctors of the same type (surgical, radiation, whatever) before making a choice.