I am 17 and I have CF. I think I may have that mutation, but I don't remember because CF is difficult no matter what mutation.
My parents, in 1995, had no idea that either of them had been carriers, and when I was born and diagnosed at age 2, they were scared to death. I have an older brother who does not have CF (18) and a younger sister that also does not have CF (12).
You are in a very lucky position going into parenthood because you are totally aware of the consequences. My parents weren't as lucky, but I'm sure if they wouldn't have changed anything, because aside from my illness, I can be the most level-headed of my siblings.
CF is very costly and very scary for parents. I myself have lived through the disease and have experienced all the pain, discomfort, and fear associated with having this life-threatening disease. I have thought about it a lot, and I decided that when it comes time for me to have a child, and my husband is a carrier, I will proceed with trying to conceive. Within my first trimester, however, I will have the baby tested for CF. If the baby is positive for CF, I will not proceed with having the child (i.e. have the child aborted.) I know this is incredibly offensive to some people, but I could never allow myself to bring someone into this world only to experience pain and fear, like I have.
I'm sure that when that day comes, it will be incredibly difficult for me, but I will have to continue on the basis that I will not have knowingly opressed my child with a disease like CF.