I also had 3-4 and 4-3 and chose 5 proton radiation treatments at Mayo Phoenix with no regrets so far. Too many horror stories of bladder incontinence after a RP. Did not want to take a chance on wearing diapers for the rest of my life. You are also much younger than my 74 years old. Even if the radiation fails and I only get 15 more years that puts me at 89.