A few quick questions that will help decide schools (and therefore locations).
What ages are your kids (like lower/upper primary), about to hit HS, HS or College (yr 11 & 12). At the moment I am assuming Primary.
Are you planning on moving in a few years, or staying there for 10 or 20? The right college is more important than PS, especially with the ACT senior program, so if you are not moving, look ahead.
Do you want to go into the private system? Waiting lists are long, so do that first if you want to.
Do any of your kids have specialist needs, such as disabilities, gifted, drama, languages or sport?
Kaleen is a lovely area, and there is a family GP there with open books (a rarity in Canberra). It feeds into Kaleen HS (and Gininderra College). Turner is an older neighborhood, and has an older demographic, so more retirement aged and less kids than the younger suburbs. It is also more expensive than other areas due to the proximity to the city. Turner PS is a feeder for Lyneham HS (and therefore Narrabundah College), which are both excellent government schools.