Hi Samg and welcome. Before I (and others very soon) chime in too much it would be helpful if you could share more of your statistics with us - for example creating a "signature" in the "My Profile" section would be very helpful. You can refer to mine and other posters here, at the very bottom of our posts.
In general with a G8 however my input would be that a combination treatment/approach of ADT+brachytherapy boost+IMRT is what is generally recommended.
Again, welcome to our little corner of the world and best to you.