Personally, I'm only eyeing to send my kids to XS/ICA or AGS. I feel that it's the right balance of good education while still staying in touch with reality (albeit barely). ISM and BSM for me are too detached from the world, too utopian, too high end.

A good private grade school for me is a must, but hopefully for high school my future kids pass Pisay. Aside from the free tuition, you get education that's as good as the best private schools in the country (and exponentially better when it comes to math and science). You also get to interact with people from different walks of life, so you break that imaginary bubble of shelter early on. After 4 (now 6) years of high school, you'll also graduate with a strong sense of nation, which will hopefully stay with you until you reach adulthood.