My husband is going through this decision making also. Our son is a physician (gerontology) who also suggests that psa testing is not appropriate for older men, especially without symptoms. He also stated that it's often very slow growing. It (prostate cancer) will frequently show up in autopsies without having had caused any problems. Identifying it and treating it (surgery) could result in a "cure is worse than what ails" situation because of the slow growth. He is however, recommending my husband undergo the bioppy as he is younger (63 years) and has a direct family history (his father) . I don't know what is considered 'older men' though as we were specifically talking about his father/my husband.
I've come across some pubmed info re genetic testing (like they commonly do for familial breast cancer). Identification of a particular gene mutation seems to be associated with a more aggressive form of prostate cancer although I may not be understanding it correctly. Our son is not familiar with this particular gene testing and recommends it be raised with the urologist.
I wish you well with all of this and hope for a good outcome for you.