I also leak that amount or more but don't know pads as I have been using external condom style catheters and leg bag. I am scheduled for the AUS (AMS 800) on 1/11/11 as well as the IPP (AMS 700LGX) . I added the IPP surgery to get both problems "fixed" and get it over with, or as over as it will be. I will be getting a single cuff AUS and will go from there. I hope the both of us will be dry or at least not too wet.
I don't think you will have problems with the vacumn device after you have the AUS but you should ask your doc. I was not so lucky in the ED department as the vac doesn't not work for me. Getting the IPP is a last resort, I think, and I would not be doing it either if the vac worked for me. Good luck and think about how nice it will be if the AUS works as well as others on this board report.
Ron