In addition to the ERNY (Extended RNY) and DS, you can also have a lapband placed over your pouch to regain restriction. In Europe they are placing lapbands over the pouch at the same time as the original RNY surgery, so that, when the pouch stretches out, there is already a method in place to continue weight loss and prevent regain. It eliminates the need for another surgery.
Lapband works really great for some, and others really hate it!
Each of these options has its own list of pros and cons. You need to educate yourself and do your own research to made an informed decision on which is best for YOU. Do no rely on what one doctor or one patient tells you. Speak with many doctors and make sure that they actually do perform the surgeries you are interested in.
Many say they do "all" the different surgeries, as a way to get the patient in the door - and then they "convince" that uninformed patient that the particular surgery that they do is the "best" or "safest" for that patient.
Be sure you know what revision you are getting. There are those on this board who thought they got one revision, when they really got another. Here is a link to where two of them have posted that they had the RNY to DS revision, when they really had the ERNY:
I don't think it's a coincidence that they both had the same surgeon.
This is the reason that you MUST do your own research and learn the "lingo" and ask the right questions before you let anyone operate on you. Some people, themselves, don't even know what was done to their insides.