If you have Gleason 6, you have time! It could take years to progress especially if it is low risk. It does not mean that you don't have cancer... you do. But it could be very slow. My own research suggested that the invasive nature of a Radical Prosectomy was riskier than PB SBRT. First there is the general anesthesia which is not without risk in and of itself. Then there is the operation itself. Again, I recommend reading Surviving with Prostate Cancer. The operation is clearly illustrated. Is PB SBRT without risk... no. After research I felt the risk was lower with PB SBRT. Will new approaches be developed... I would guess yes. You and I lucky that we were diagnosed now versus 1992... but perhaps not as lucky as if diagnosed in 2042. By then people will look back at us and our doctors and wonder how we could be using such old technology! Best wishes for a successful outcome.