One other step you can take while waiting for the MRI is to request one of the newer predictive tests such as the EpiSwitch PSE test (there are others as well) which look for biomarkers of prostate cancer in blood or urine samples. One of the other contributors to this group - @jeffmarc - has a very helpful chart that shows the various tests available and their relative accuracy. Perhaps he will see this posting and add the chart for your reference.