Hi Junior,
I think you are a wonderful advert for RT / HT - the fact that your RT was 15 years ago and you are only just starting to see the PSA creeping up is amazing, particularly as you were T3 at diagnosis! Officially, you are still in the clear as your PSA is below 2.1 but it must be a little bit worrying - will it rise faster, is the cancer back, how high will the PSA rise before I need to do something?
I guess that you are in a similar situation to my dad now - he is 86 and his PSA is creeping up but he has decided not to have any treatment yet - based on how slowly the PSA is rising, the urologist predicts that prostate cancer won't affect my dad's life until he is in his mid-90s .... Dad's view is that if he lives to his mid-90s, he will deal with the cancer then.