Preschool-Elementary schools for two young boys (Valencia)

We are movIng from San Francisco, California to Valencia in January and are looking for private or international elementary schools (English) for our two young boys (ages 4 and 5-1/2). We are city dwellers so will be looking for city residence and prefer those schools located in it. Any insights about academic standards, reputation, community, etc that you can share about the options? Thanks much!