My numbers were the same as yours except that my prostate was much smaller and I'm five years younger than you. I did Image Guided IMRT and have been happy with the results. My first post treatment PSA was a 1.9 and my most recent was 0.8. My only long lasting side effect is the occasional loose bowel.
I also agree with JustJulie. Do your research, make your decision, and don't look back. Best to you.
August of 2006, PSA up to 4.2 from 2.7 one year ago.
October free and total PSA 12% free and 5.0 total.
A month, or so later, 4.7.
Late in the year decide on Image Guided IMRT.
Begin 43 treatments on January 23, 2007 and finish on March 23.
Four month post treatment PSA is 1.9.
Seven month PSA is 0.8.