Have you studied Dr. Patrick Walsh's book " Guide to Surviving Prostate Cancer " The 5th Edition .
Money well spent . You may get your answer there . You have many options -- All with similar results .

I'm 31 months post RP and I also was a 3+4. I spent a number of months debating options with similar interactions with various specialists while going deep into research papers. At the end of the day I came to the conclusion that RP offered the best statistical outcome. The surgeon ended up taking out the prostate and I lost one nerve bundle. Working backwards and of highest priority, my PSAs are at zero. Now for the information most men care about next to remaining on this side of the dirt- With a hell of a lot of effort, diligence(using Trimix for about 5 months) and patience in year one post op, I still have a good erection, I have roughly 50% of the previous sensation during intercourse and I urinate more frequently than before but not to a level of annoyance.

Good luck and what worked best for me, may not be the best option for others.