In reply to mypyrex:
Not a doctor.
Speak to your doctor.
Have these symptoms increased in the last 12 months? If so, follow it up: PSA is a useful marker, but not foolproof - and may be low in many cases of BPH. Equally, the digital test isn't necessarily that great: your doc may be brilliant at it, but it only detects grossly apparent architectural changes at best and bugger all at worst.
At the risk of triggering the usual 'you stick to spaying cats and I'll look after *my* patients, thank you very much' response, I'd be inclined to ask for a scan and a follow-up PSA within a reasonable timeframe. The scan is quick, cheap and much better at detecting early prostatic change than someone's gloved finger.
If you're symptomatic, follow it up: there's nothing down that road which would be outside of your own recent experience, so you know how it should go. The theory that your bladder just gets benignly weaker with age doesn't necessarily hold water.
(Thank you, I'll be here all week.......)