Six years ago I went to Dr. Marchesini in Curitiba, Brazil, and would do it again in a heartbeat! The experience was so wonderful that I chose to go to Brazil for my plastics, too. The level of care down there far surpassed what I had ever received here in the states, and I've had my fair share of surgeries! Dr. Marchesini is an amazing surgeon; my open DS (including gall bladder removal) was done in 56 minutes, and I had no complications. You are required to stay in Curitiba for 2 weeks after surgery, because if there are any complications, they almost always make themselves known in the first 10 days. I had a leak test before he let me leave the hospital.
You are very right to research! I also was unable to get insurance to pay, so actually researched Dr. Marchesini and comparable surgeons for over a year before going ... I felt 100% comfortable with my decision. After all was said and done, I knew it to be a blessing in disguise that insurance wouldn't pay, because I ended up with a much more brilliant, skilled, CARING surgeon than I would have gotten here. You should join his yahoo group at
http://health.groups.yahoo.com/group/DrMarchesini-DS/ . You can read the files, read past posts, and ask questions.
Best of luck to you, whomever you choose!