I am 74, and always fit and active. In September this year, following MRI and perineal biopsy, my PCa was diagnosed as Gleason 7 (3+4) across 75% of cores taken from my prostate. There was no evidence of spread outside of the prostate. The same options with which you are grappling were put to me and I attended a urology clinic where I saw a consultant oncologist (to discuss RT) and a consultant surgeon experienced in RALP.
The oncologist described in great detail the RT journey and also stated the possibility (and I stress 'possibility') of collateral damage, some of which may not become apparent for several years. She knew I was going to see the surgeon next and it was apparent to both myself and my wife (if you are able, always have someone with you - these are emotional times and your recall and presence of mind may not be what you expect), that she was not madly enthusiastic on the RT option for me.
The surgeon believed that my PCa being localised, me being a fit and active person (BMI of 22) and wanting to minimise the chance of invasive procedures in the future. I was an ideal case for RALP. Whilst he didn't actually advise against RT, he did say that if salvage surgery was required after RT, it could be very difficult whereas, if salvage RT was required after surgery, it would not be a problem. This was a view also expressed by the consultant urologist who we saw on my initial attendance at the hospital when he was explaining all available procedures prior to my subsequent tests.
I had my surgery November 5th with intra-operative Neurosafe that confirmed clear margins and my nerves were spared.
Far too early for me to comment on success and suchlike. The purpose of this post is merely to describe events that led to my decision. Hope it is f some use.
One more thing I have learned and of which some on this forum will be aware from my previous posts. Whatever decision you make, you are likely to question later. Try not to. Once done, just get on with it. And thank you Dave and Lyn for pointing me in that direction.