We have discussed this ad nauseam in threads before you came aboard. There are some strong opinions about the topic of overtreatment. You might want to scroll back and look through some of them.
My advice in a nutshell:
1. Take your time. Do not let anyone rush you.
2. Question everything someone in a white coat tells you about prostate cancer. Question it, don't necessarily reject it. Most advice will match up quite nicely with the doctor's financial interests; advice that doesn't is rare and especially valuable. But above all, make your own decisions - at this point doctors are only advisors.
3. To put yourself in a position to make those decisions, go straight to the medical literature, armed with a good online medical dictionary. I found these two articles very helpful when I went through this process in mid-2008: (1) Timothy Wilt et al., "Systematic Review: Comparative Effectiveness and Harms of Treatments for Clinically Localized Prostate Cancer," 148 Annals of Internal Medicine Issue 6 (March 18, 2008); and (2) Martin G. Sanda et al., "Quality of Life and Satisfaction with Outcome among Prostate Cancer Survivors," 358 New England Journal of Medicine 1250 (March 20, 2008). I believe that at least the former is available online. There are other good articles that came out after my surgery last August. Do your own research.
4. In addition, there was a recent thread (last week?) about Dr. Peter Scardino's recent presentation to the New York Chapter of the American Urology Association. Find that link and study that presentation. But again, this is only one doctor's opinion (although one I personally think highly of).
5. Finally, read and understand Dr. Otis Brawley's piece entitled "Prostate Cancer Screening: Is This a Teachable Moment?" published in the Journal of the National Cancer Institute and online on August 31, 2009. Dr. Brawley is controversial, to say the least, but whatever you end up thinking about him, he is an important voice that you should at least understand. He has been widely vilified, misquoted and quoted out of context - so read him in the original, slowly, and in full to get his nuanced approach, then make up your own mind.