My diagnosis was similar to yours, just ten years younger. I was 3 + 4 and was going to be on active surveillance until they did the Decipher test that showed it to be aggressive and then had the surgery.

As you'll see me post repeatedly for the benefit of all those who, like me, only read about the doom and gloom of this procedure: I never had a single moment of ED or incontinence after RARP. Remember that most guys that stick around on the forums are still dealing with issues or are new. That represents a very small group of men as the vast majority are back to normal within 12-18 months (as in over 90%).

I would request a Decipher and if you aren't low risk then keep getting your tests. If you are in good health and decent shape you have a good chance of no negative side effects, if not then you should start getting into shape now so that if and/or when you have to go down this path that you give yourself that absolute best outcome possible.