I have two friends whose amnios showed Downs. They opted to keep the baby and pray. Both of their babies were born with ZERO trace of Downs -- their babies are now 12 and 11 -- and quite bright.
Having said that -- I would keep the baby.
I also have a handful of friends with children with Downs. Although they definitely have faced challenges, all of them have learned not to sweat the little things, to be more grateful for little things, and to find joy in little things -- because of the example set by their "challenged" children.