Popular schools in SK is Nan Chiau & CHIJ (Nativity). There's alot of 'criterias' to consider before choosing the school, else you'll only be met with disappointments.
Different people have different perspective of 'good school'. Some look at results. Some look at parent communication. Some look at character development. Some look at school culture. Some look at principals/teachers. It's really up to you. Visit the school and decide if their school values/goals/mission is what you want for your child.