I just hate it when I tell someone that I had prostate cancer and they then tell me that I had the good one. As you know there is absolutely nothing good about PC and what men with it go through. It is life changing no matter what degree of results and recovery you have from treatment. You are being methodical in your approach which is exactly what you need to be. Many of us with PC have had to work our way through the opinions of urologist as to treatment. I still am surprised at the difference in the types and numbers of different post diagnosis test among urologist. In my case I never had a post diagnosis test and my urologist said that they tell him very little. Of course, I did not have a positive DRE which according to your stage you did.
As to types of surgeries my urologist had done over 2,000 open types when he began doing the Da Vinci. He has now done over 1400 Da Vinci's. He told me that he committed to learn how to do the Da Vinci because he was not convinced that it was better then open and the only way he knew to find out was to start doing them. He is the head of a urologic center at a major univeristy so they keep a lot of statistics. The last time I had an appointment he told me that they were not ready to publish yet but their data comparing complication rates and results indicate that the Da Vinci does have an edge over the open but it is not a large difference.
Look forward to hearing from you as you go through your journery.