Lurkette,
Although you are seeking advice, this is an area where I believe it is up to the individual. I do respect the fact that you and your hubby are facing this as a team.
My only suggestion here is if you are not 100% entirely certain that you do NOT want to have children, I would look at other means of birth control besided surgical measures.
Best of luck to both of you in what you do.
*closes eyes and visualizes a cute little purple haired baby*