Now those are some terms I would have never have put together “culturally and economically diverse” and “La Costa and Encinitas.”
I am afraid there is no easy way to break the news to you, socio economic diversity = crappy schools. You may find some cultural diversity in the better school districts but that diversity won’t come in the form of a large amount of spanish speakers aka english language learners. Poway, Carlsbad, Encinitas, La Costa, La Jolla, Rancho Bernardo and Scripps have some of the best schools in the county but I doubt you’ll find anyone use the word “diverse” when describing them. You will find all the races represented but upper and upper middle class neighborhoods for the most part have upper and upper middle class people. If you have to pick, pick the best school and just don’t teach your kid to be a racist or an elitist, perhaps mandate charity work as a family while they grow up.
Please read some of the other threads before you buy now or rent in one of those communities first, I feel like I have been transported back in time and I am watching someone buy a ticket on the titanic.