Note that I am the self-described "Bad Cop" here - because I'm going to be a little blunt.
I would hope that you really understand what you are getting with the SADI, because there are no long term results for this still-experimental procedure, and it does NOT have the benefit of selective fat malabsorption that the DS does. If you don't know everything there is to know about the difference between the two procedures, and why you think the SADI will suffice (will be good enough), then you aren't ready for surgery. If Kim is ONLY doing the SADI, then you may not be getting all the information you need from him - you should ALSO talk to someone who does a proper DS.