Well, depending on how overweight you are, you may really want to research the DS. You would have to travel to get the surgery (and for follow-ups for the first year or so) as no one in Delaware does it. I had it, and readily sing its praises. It's not as easy to get done, but worth it. I eat normal portions, can still have sweets if I want them (no dumping, ever), and I've lost a lot of weight in a relatively short time. I don't have a strange odor, chronic diarrhea, or gray skin - the common myths about DS patients. There are those that experience vitamin deficiencies, surgical complications (it's a much more complicated surgery than the RNY or LapBand), or too much weight loss. YMMV. As long as I take my vitamins, the malabsorption doesn't affect me. The only drawback for me is that my poop stinks more than it did before.
After the DS, I think the RNY allows people to lose a lot of weight, although the regain percentage is higher than the DS. If dumping is a positive for you (and the possibility scared the bejeezus out of me), then it's got that going for it. You have a lot of restriction and fairly little malabsorption. Lots of people have had RNY and it can be done locally. The negatives, for me, were that you could eat only the tiniest portions of food and that the malabsorption was so trivial that it didn't provide enough help during maintenance. I'd still have to diet even after having the operation, and dieting was sooo not working for me. Plus dumping if I ate something with too much sugar or fat - although to be fair, there are some 30% of people who get RNY surgery and don't dump.
The LapBand seems to work really well for people with lower BMIs who just need some restriction. It initially appealed to me because it's the least scary of all the surgeries - no one's cutting your stomach or intestines, right? The fact that you could have it removed at some point - completely reversable - was also a big plus in the pro column. In the negative column, the fact that I could never eat certain foods again because they'd get stuck or cause "sliming" was a real turn-off. There are also people that fail with the band because they rely on soft foods like ice cream and mashed potatoes because they go down easily and are easy on the banded stomach, but also are hightly caloric and cause weight gain. That said, you can out-eat any surgery if you really put your mind to it . With the DS, I have to watch my sugar consumption - only one treat a day if I still want to lose weight. Today's was a cheesecake brownie.
Please look at all of the options and decide what you think will work best for you. You have to remember that you will be committing to this FOR LIFE. You'll get lots of help on the LapBand and the RNY here. If you want any info on the DS in addition to what I've provided here, you can PM me or come over to the DS forum.