How to find a surgeon:
https://www.susans.org/forums/index.php/topic,197983.0.html
Red flag words/phrases from potential surgeons:
https://www.susans.org/forums/index.php/topic,194660.0.html
Surgery prep list/recommendations (which includes some surgeon-specific stuff):
https://www.susans.org/forums/index.php/topic,186413.0.html
My advice would be to make a list of what matters most to you, and compare how each stacks up. For me, my choices were Dr. Fischer, Dr. Garramone, or Dr. Zinsser. I wanted to be flat, have decent aesthetics, and get it all done as cheaply as possible. All of them I knew could get me flat. I crossed Zinsser off because I didn't like the way his post-op nipples looked. When deciding between Fischer and Garramone, I took into account total cost of the procedure with each plus what it would cost me to travel to them. I went with Fischer because it cost me the price of the procedure, plus $100 for an overnight hotel stay, and a tank of gas to drive to and from Baltimore twice from my house in DC. With Garramone, I would've had to fly to and from Florida and stay there for about a week, which would've tacked on several hundred dollars to my costs.
There are plenty of threads on the board about Medalie if you look through the last few pages. Not much on Weiss that I can recall.