Yep, been there and done that with all the research before my surgery. I know what you are going through. Its normal feelings of what you are going through. Just remember to not push yourself after the surgery, Being with other people in a support group has a lot of advantages, you will understand the process from other people's experiences in their post surgery.
I am very happy in my lap-band since Sept 3rd 2010, I am very pleased with my lap-band choice over the RNY Gastric Bypass which I almost had.
Let us know how you are doing after your surgery!