C.B.
Have you given any thought for looking in the Eanes school district? School is not that far off for you, and my kids got the most amazing education there. Neighborhoods like my old one, Barton Creek West, are a lot like Circle C as far as the houses are concerned.
We had a 2 story with master down, which worked well for us with 2 school aged kids. We had a little privacy, and they had kiddie heaven upstairs.
Now that kids are out of school we live in a one story house in South Austin. One story does better if climbing stairs is a problem for you.
Good luck in your search.