The bottom line is that you have to do what works for you. You get to live with yourself/your body for the rest of your life. What would please you?
There was a point when my Lap Band just seemed not to be working out (I must say it is beautiful now!). I kept trying but eventually began to consider other avenues. I was thinking that a hybrid version of the DS would work for me. I thought that I'd leave my band in place and get the intestinal portion done with a longer common channel. I did not want to go drastic. I never wanted to do that with my body.
You've done incredible with the Lap Band and that,as you know is a purely restrictive procedure. Because you've done so well with restriction only why wouldn't you consider the Vertical Sleeve Gastrectomy? I hate to put the option of a 3rd surgery on the table, but if you got the VSG and it was not enough, you could later get part 2 - the malabsorbtion portion of the DS.
Forget other people. What do you think is right? You said you feel comfortable with your decision for the RNY - I am sure you explored very, very thoroughly. You go for it girl. Forget what anyone has to say. For get the "my surgery is better than yours" crap. As long as you are completely willing to take care of yourself and do whatever it takes to be healthy with a bypass, don't let anyone and I mean anyone stop you. Many have been successful with the RNY and I am sure that you will be too.
Much Love, Peace, & Harmony,
Leila