Dear all,
A quick update: I have now spoken with both surgeon and oncologist. Both steered me towards surgery (RP) because of my age and relative good health. The oncologist is thinking along the lines of: "you would be expected to live 20+ years and in that timeframe, you are likely to suffer from long-term side effects from radiotherapy". Similar story to what @Alex_cycles mentioned...
I did talk about HIFU with the oncologist and urologist but both were dismissive. They were not convinced it would remove the cancer in my case, merely delay RP or RT by a mere few years at most... I guess it's because the cancer is in both lobes and it would be difficult to eradicate it completely? The urologist also mentioned risk of fistula associated with HIFU...
I also discussed proton beams with the oncologist; she said that while side effect my be lesser in the short term (when compared with standard form of RT), long-term side effects from proton beam would be on a part with other RT techniques ("radiations are still radiations"), so for a young patient like me, it's still not the preferred treatment path.
Bottom line is: everything points to RP.
I have now booked Retzius Neurosafe Robot Assisted RP with a leading surgeon professor at London Bridge Hospital. He is a high-volume surgeon (BAUS website) and all I can do is hope it goes well (i.e. cancer is fully removed, any continence and impotence issues are temporary, etc.).
@Jeremys, I will definitely look at the TechGuy conversation.