Hi Peter!
First off, sorry you have to be here!! Secondly.....LOVE your login name!!!
We are also in Calgary. My husband was diagnosed at 45 with very early stage, low grade disease. He opted for AS for a couple of years, then had brachy at the Tom Baker at age 47, Nov. 8, 2011. The reason he opted to proceed with treatment wea that his prostate was getting larger, and had he delayed further, he would have had to have had hormones to shrink his prostate.
I agree that you are too young to have EBRT (external beam radiation therapy), but I DO think that HDR Brachy would be a fantastic option for you! Calgary is in the process of bringing HDR brachy on-line. All the Rad Oncs have had training, and the equipment is in place, and ready to go. The only holdup (as far as I'm aware) is political, but things should be rectified in the not-too -distant future.
Also, depending on your risk category, LDR brachy may still be an option. I know that they do LDR on some G7 patients, depending on what "risk category" they fall into.
I'd be happy to share info with you, if you'd like!!
Take care!!