Good points, everyone! The only reason an older dog scares me is because a family member had an adult dog that was good with children. However she was not raised with the kids, and in the long run she thought she was more dominant over the kids and it was just not a pleasant experience. Granted, she was not a border collie and I guess I could go meet with the dogs beforehand to see how they interact with my kids. But with a puppy and solid training, it's like a clean slate. Yet I understand the argument of genetics playing a part in the behavior and you don't know exactly how they will be until they are past puppy hood.
I am up for the challenge of the puppy raising. I was 7 months pregnant when I got our dog, Banjo, and had our first son as well (two years old at the time.) I know some luck played into it too cause he loves to please! Maybe I will look into a rescue now and puppy a year or so down the road. Our family loves border collies! Best, smartest dogs :-)
I will re-read the rules/posts here. Sorry, are you all not allowed to suggest certain breeders or you just don't recommend some? Thanks all for your help!