It's not only his PSA reading with is a consideration, you need to obtain a copy of the biopsy report which will include the Gleason scores, number of positive samples and other important information.
With more extensive screening, most men are recently diagnosed with early stage low volume Gleason 6 tumors, which in many cases will never cause them any problems, and raises the dilemma of over treatment. The problem is to determine whether you are dealing with a ***** cat or a tiger or something which might turn into a tiger in the future.
To assist, information has been published active surveillance criteria, for example in the winter 2003 newsletter of Johns Hopkins. www.urology.jhu.edu/newsletter
Active surveillance doesn't simply mean waiting a few years: regular monitoring and lifestyle changes need to be considered.
When thinking about his plan, he needs objective information. Many people and publications have a mindset of ther favoured treatment. The fact is that there are at least several approaches and treatment options which will provide a similar outcome, which often comes down to personal preference and consideration of the potential side effects. Side effects can be difficult to compare because there are so many variables, treatments have improved greatly and a top doctor will have a huge influence on your outcome.
Although written a few years ago, one of the best overall books is "Prostate Cancer Prevention and Cure" by Lee Nelson MD, which includes diagnosis, stages, treatment options, selecting a top doctor, lifestyle changes, exercise, diet etc.
Biopsy readings are subjective: what looks like cancer to one person could look normal to another. The slides should be sent to an expert pathologist for a 2nd reading if this hasn't already been done.
After one positive Gleason 6 sample and PIN in my 2004 biopsy, I used the watchful waiting option. My recent biopsy was all clear. If I do need to make a future treatment choice, the treatment and doctor options for me will be completely different to what they would have been 4 years ago, and my chances of a better outcome will be greatly improved.
It's certainly not a case of one size fits all, and does come down to the individual situation and choice.