I'll add my welcome, also.
My approach to this was to place complete confidence in the specialist/Urologist/surgeon my primary care physician recommended - and he told me if he had to deal with prostate cancer he'd go to the same Urologist and take his advice.
After my biopsy disclosed the presence of the cancer the Urologist recommended the da Vinci method of surgery to remove it, because of my age, my otherwide good health and the results of the biopsy, and after a few questions I made the decision on the spot to move in that direction (removal via da Vinci).
The Urologist recommended surgery at 6-weeks after the biopsy but I developed a sepsis infection after the biopsy and wanted to be healthy for the surgery - so I pushed back the surgical date to about 2.5 months after diagnosis.
My preference was/is to take care of medical problems as quickly as possible and move-on with my life. I didn't go for a second opinion nor did I undergo MRI, CT or other testing - I have confidence in the Urologist and in my hospital. My Urologist performs about 15 of the da Vinci procedures monthly and I searched the www and found this excellent forum and I read the information here and at scores of other websites that discuss the various forms of treatment - and I was convinced further I'd made the right decision for my personal situation.
My primary care physician reviewed the biopsy report, discussed it with the Urologist, and concurred with the course of treatment recommended. I don't believe the Urologist steered me to removal (and removal via da Vinci) because it was his preferred procedure, but because, in his educated and experienced judgement, it was the best course of action for me.
As for post-treatment complications: they exist in one form or another for each of the treatment options, from what I understand. I can live with the temporary (hopefully!) incontenence issues, and the potential ED issue (which early indications are I may not have to face long-term) is a non-issue for me - because a longer and overall healthier life is what's most important to me.
Odd as it may seem, my primary care physician greeted me after the biopsy with the comment "It's a good day, not a bad one." He explained his remarks by saying the cancer was there in my body and through yearly testing it was diagnosed / discovered early, early enough that it hadn't spread and early enough to deal with effectively so that my life would not be further threatened. I've adopted his "It's a good day" philosophy, don't dwell on the now-removed cancer, and I'm steadily getting my life back in order and I'm back at work.
You've come to the right spot on the www to learn more about the choices ahead, and what the likely results of that choice will be.