Bui
Sorry to hear your news. I had a similar score from my Biopsy in September (3+4 T2c). Speaking to both my surgeon and oncologist I was offered two treatments - Radical Prostatectomy or Brachytherapy. I discussed active monitoring, however, neither doctor believed this was a possibility.
The trouble there are no definitive answers and everyone has different perspectives on what important for them and what is less so. However, when doing "research" (mainly this website, doctors and materials from Guys/London Bridge Hospital) I found it helpful to breakdown the treatment differences into four categories:
1) Chance of Success - How successful is the treatment, and are there salvage options should the treatment not be successful
2) Short-term impact - What would the aftermath of the treatment be like in the first two months? inc amount of time off-work
3) Medium-term impact - What are the side effects from two to nine months?
4) Long-term impact - Are there any long term side effects?
Point 1 was the most important and would have been a "deal-breaker" if there were material differences.
For short and medium term impact I also considered the treatments available to deal with these. And I validated my "research" with the doctors and nurses, asking each the same questions to see if I got consistent answers. I also spent a lot of time getting my wife's view on dealing with the treatments and articulating pros/cons to her.
This may not be perfect and but I was able to rationalize what was happening and come to a decision on treatment which I am comfortable with.
Good luck
C