My personal option: looking for a good school is one of the considerations but I guess we must consider one more important factor - affiliation in Secondary School. With affiliation, parents and kid won't be so stress over not getting into a reasonable good sec school cos the entry point is lower for their existing student. Eg, St Anthony, ACS, St Margaret, etc. So if you kid does very well, she / he can choose to go to another better sec school. However, if you kid didn't do very well, he / she still go to a reasonably good sec sch due to affiliation.