I want to thank everybody for all the inputs. Lots of good information and thoughts by everybody.
I called Sleep Number today to see what they had to say. The young lady I dealt with said she has had several calls this summer with popped RV mattresses from changes in altitude. She said mine was under warrantee and they will ship out a new air bladder to us. So I guess we will stay with it a bit longer and see what happens. We have bought the foam topper for it so it is acceptable to sleep on.
I've done some research and thinking on this, and will start a new thread for that discussion.
Thanks again for all the input,
Jeff