So what school should Wesley's Methodist be categorized in? It's situated in Sentul. AFAIK the reputation of that school is really good and almost all of them have a good command in English. The only drawback is the fees tho. It's a pain in ass.

The best choice to educate a child from young IMHO would be sending him/her to a Chinese primary and then an English speaking school for secondary. Afterall, English is the main language we are all concern about. Not to offend any CIHS students but like what someone has said above, majority of the students from Chinese schools can barely communicate in English. I've got a friend from CIHS who can write really good English having difficulties to speak with it. This is due to the lack of English usage in CIHS but from my experiences, I've seen people who were weak at English during chinese primary are able to improve their English a lot after getting into English speaking schools. Are they any weaker in Mandarin than those who are from CIHS? No, they don't have a single difficulties speaking Mandarin at all even after they get into English schools and yet you can see them being able to read a chinese newspaper. Are they better in English than those from CIHS? Yes, they can definitely speak better English. Bear in mind that sending your children to English schools do not mean that they will turn into "bananas". The most important thing is that you HAVE TO send them to Chinese primary for basic chinese education which is more than enough to be able to communicate with anyone in the world in mandarin. English schools or not you can decide later when they finish their primary education.

If I were you I would definitely send my children to Chinese primary first and then English speaking schools for their secondary education.