I'm with VacationForever. With young kids, I doubt you'd want a separate entrance for the studio, but that's up to you to decide. There are many differences between dsv1 and dsv2, but I think that is the most relevant for your case. If you do not, then, dsv2 is definitely the better choice. I also dislike Shadow Ridge. You will definitely get great trades if red season.
Since your question is which to own.... I would say dsv2 for sure. Why? Even if you want to stay at dsv1, you can easily trade in virtually any season. This year, I initially had traded my dsv2 lockoff for a dsv1 2BR, but then decided against it as I wanted to extend the stay and a 1BR was cheaper points wise and there's only 2 of us. Why would I want to pay more MF when I can stay at either for less MF. This only applies if you are going to buy II membership (not enrolled) anyway, as if you intend to always occupy, then, decide based upon the separate entrances as mentioned.