And here's how your school stacks up: http://www.greatschools.net/cgi-bin/ca/district_profile/680?
Try to find parent comments - that always helps - but teacher to student ratio is always a tell-tale and relate directly to the standardized test scores.
Not all of the schools are compact enough so that all the kids can walk to the school, so you need to look at location of homes vs. location of the school. You might find our "Homes By School Boundary Maps" to be of interest because they allow you to compare homes while simultaneously comparing schools and scores. You'll see a link to it at http://www.EncinitasCarlsbad.com.
I hope that helps. Call if you have questions.
The most reasonable area as far as price and school would be Calavera Hills. Rancho Carrillo is great but the High School is San Marcos.
Here's a list based on the 2006 API scores of the highest scoring schools in San Diego county, and overall district averages. http://FileLibrary.MYAASite.Com/Content/12/12509/23987066.pdf
To live near the top performing El Camino Creek Elementary, you may find the older community of Rancho Ponderosa to be more affordable.