It depends on your preference. I feel that if you have more Chinese in your neighbour, you could feel pressure for your kids at school, as you know we like to compare with each other. If you want your kids (and yourself live in a more relax life), then you may like to choose to live in a neighbour with fewer Chinese. I feel that now it's hard to find anywhere where there is no Chinese, and it's not bad to have a little bit pressure as compared with kids in China, the life for the kids here are already quite relaxed and I guess you don't want them complete relax without learning anything. Even in the area where there are more Chinese, we are still minority in the school, not like in Tornoto, Chinese become majority. I personally feel that you should live in a place where you have enough contact with local people, otherwise, there is no need to come to Canada. My 2 cents.