Hi. Your final decision will probably have a lot to do with where you plan to live, since neighborhood seems to be a big factor when choosing a pre-school.
If you will live in Miraflores though, I`d recommend Kindercare, which is on San Martin and Pasaje Sucre. We sent both of our kids there and never had a problem; not just that, it was nothing but good experiences. Well managed, good teachers and infrastructure.