I am reasonable new myself and you will see that are stats, age, psa, gleason etc, are very similar, the only difference is that I am about 5 months in front of you. I too have been taking many supplements to try and help my situation. So far things are going good and I will have my 5 monthly psa check-up next week, so fingers crossed it comes back ok.
As you can see by my signature, I had daVinci, on the day before X-mas day 2008. I had the operation in Sydney, Australia, by a well respected surgeon here Dr. Philip Stricker. I was extremely pleased with the results and had no problems at all. I have regained full control of the water works within a week, but Mr ED is still a problem, but I am working on it with Meds (Viagra etc) and starting to see some improvement, but they tell me it can take up to 12 mnths to 2 years to return.
As far as supplements/diet etc are concerned, I have become a Doctor Google, and have researched many different types of supplements and diets which claim to help with PC. I can only suggest you do the same, as the choice is many and varied.
Don't forget to keep doing you pelvic floor muscle excersises, I found they really helped me with my recoverey. I am looking forward to following your progress, please keep posting here, I have really found it a benefit, reading others posts, as you do learn so much. As you will find out there are many here far more experienced than myself, whom are more than willing to help you with some really great advice.
Stay positive, non of us really wanted to be here, but we are......Cheers Nothard