I've had the DS. I'm about a month post op and my highest weight was 320. At your starting weight I'd really consider the DS for its better weight loss and lack of regain, or go bypass if you have a lot of GERD issues. I have some GERD issues but it is controlled by medication pretty well and I needed the DS because I'm diabetic with high blood pressure, high cholesterol, sleep apnea. I had a hysterectomy for cancer.
All in all so far it is worth it! I'm down 30+ lbs from my highest weight, off all diabetes medications, off blood pressure medications, my blood sugar is normal, my BP is normal, and I have more energy! I'm really glad I went with the DS. Its a riskier surgery but only by a bit, and the things you gain from it like disease remission made it very much worth it for me. I'd encourage you to read about ALL the various surgeries and then discuss it with your surgeon. They'll be able to tell you what will be most effective for your individual case based on their experiences. If you can, go to someone who can perform any of the surgeries, only certain surgeons can do the DS or Bypass.