Thanks Gingernut,
I would agree that, from all the comments I've heard that the PSA test alone is not clever enough to be used as a screening tool but there are some new developments which could improve things. Having a test done, even if it proves negative, still puts a dot on a chart that can later be used to plot a trend and that's what helped my case. I didn't have any obvious symptoms and only went to the doc in the first place due to "Family History". Chances are that my dad developed it at about the same age as me but didn't get picked up till much later in life.
I still count myself as very lucky.