@Nith,
Hi, Nith
A couple of questions first.
Where do you and/or your husband work? School is one thing and commuting is another issue. Focus on access to work - and then pick an area with a good school.
Are you bound to those suburbs you mention?
Are you looking at state or private schools?
Having said all this - I know absolutely nothing about schools. In a previous response, another poster has recommended the Beecroft area - where his children go to school. However, there is a significant price differential between Beecroft and any of the suburbs you mention. And I'm not aware of any especially good schools in those suburbs.
Post again and I'll try to be of help.
Well tagged, Bethie!