Canuck, back in my research days I looked really hard at both LDR and HDR and honestly I would have been comfortable with both. There are some minor pro's and con's between the two, but nothing IMHO that would sky rocket one over the other. I chose LDR primarily because it has a longer track record and I found one of the best LDR practitioners in the world less than two hours from my home.
JNF is right on about Dr. Jeffrey DeManes - absolutely the forefather of HDR. I had a phone consultation with him and was making plans to fly out to do an initial consultation, and then found the CPC where I had my LDR. I would encourage you to contact him at the CET/UCLA, I think you'll find that very helpful at this point in your journey. Here's a link:
And if you're interested in learning more about LDR I would encourage you to get ahold of the CPC:
Best wishes to you as you work down towards YOUR decision for treatment.