Exploring My Weight Loss Options - Is lap band the right choice?

BMI is 33 - I know I am borderline - but I have 4 other medical factors to consider.

I am starting to explore my options as it relates to bariatric surgery.  My BMI is on the lower end of the spectrum (which might seem great) but it's not.  I have been fighting with weight for 15 years, I am diabetic, hypothyroid, high blood pressure, high cholesterol, and fatty liver disease.  I take 6 medications per day and I am only 44 years old.  I need to lose at least 50 lbs and have struggled forever to get the scale to budge more than 5 lbs.  I talked with my primary and he said that my BMI was not high enough for surgery because I do not need to lose 100lb.  However, I have a consultation with a surgeon next month because I was told by the surgeon that because I have so many medical issues - I might be a candidate.  I know I am not a candidate for bypass - but maybe for the lap band.  I am a little nervous about going this step, but am feeling like I am out of options.  I exercise 3-4 times per week already. 

I am trying to research to see if lap band is worth it....I know everyone is different, but I am concerned about taking this step and only lose 10-15 lbs,  Is gastric bypass better than lap band....any advice anyone can give me would be great...