JasonB, i was in the same boat as you after consulting with most of the doctors you have listed. After reading reviews and also speaking with a few people I chose Dr. Simmons as he is a coalition member and produces excellent results. You can see his results on the forums. I would say H&W, Rahal, and Simmons are the best in Canada. Personally, H&W charge a lot more for the simple reason that they perform mega sessions. If you are in Toronto and are going to have a HT with 3600 grafts or less I would recommend going with Dr. Simmons. I have a friend who also had a transplant by him and has has excellent results.
I just had my HT with Dr. Simmons about a week and a half ago and had a great experience. His staff has been working with him for about two decades and he himself has much experience. You will not be dissapointed.