Advice needed please. (Colombo)

Hi there, my husband and I are relocating to Colombo at the end of the week with our two children who will be attending the Overseas School Colombo. My husband will be working in Colombo 2. Would just like some advice on which area to live in which would be the best/easiest to commute to for my husband and children to go to school. We have not decided weather we would like an apartment or a house as yet but would like to be in an area where there are other expats and children for my kids to socialize with. Thanks in advance.