Hi Paul,
I'm sorry that you find yourself here.
I am 67, so considerably older than you. Some of my experiences may not relate to your situation.
I was diagnosed 12 months ago. I had a PSA of 13 (so slightly higher than yours) and, after the biopsy, I was given an initial diagnosis of T2, with a Gleason score of 3+4. I too was refused Brachytherapy. I was offered Surgery or Radiotherapy with Hormone Therapy. I might have had the Radiotherapy on its own but I was worried about the side effects of the Hormone Therapy on my mood and libido. They did not recommend Radiotherapy on its own, so I opted for Surgery in the end.
After removal of the prostate, the histology report indicated that my Gleason score was actually 4+3, with T3a, so the cancer was more aggressive than they first thought. So, one advantage of the surgery is that you get a more accurate diagnosis than can be achieved with just a biopsy.
On the negative side, I experienced very severe incontininece for the first few months. (I am told that my level of incontinence is very unusual). I am now 11 months post-surgery and my continence has improved, but that still means I'm using 2-3 pads per day.
As far a sexual functioning is concerned, I still have zero erectile functioning, even though my surgeon advised that they had saved "most" of my nerves on both sides. I have been prescribed Cialis (Tadalafil) and a Vacuum Pump and Alprostadil injections. I've reduced my use of the injections recently as I find them unreliable at low doses but give painful erections at higher doses. (There is an alternative to Alprostadil injections, called Invicorp, which I am advised has few, if any, side effects and works just as well).
I don't know in which part of the country you are, but if you opt for Radiotherapy, that will usually entail daily visits to the hospital for the duration of treatment. That can involve a lot of travel. Given that you are self-employed and need to be at your bar, will that cause logistical problems? The radiotherapy's adverse effects usually develop much more slowly, so one advantage is that you would have more time to adjust to any changes.
The surgery option usually involves just one night in hospital, although you will have a catheter for about a week or so and that can make mobilising a little more difficult [and you would probably be more conspicuous to your customers :-)]. Once the catheter is removed, you will feel a lot more comfortable. If you are incontinent (and be assured, not everyone is), the incontinence pads are fairly inconspicuous and people won't know that you're wearing them. But they're an inconvenience (and I find them humilating).
Good luck with whatever you decide.
Best wishes,
JedSee.