Hello Tomhazard
Waving from KL! I live very close to Kota Damansara. It’s on a really good side of KL for expat living.
Many options for you to live happily and comfortably with your family.
Desa Parkcity is a great location. I admit to being biased as love living here! Variety of housing and budgets. Own international school (ISP) that I cannot recommend highly enough. Kindergartens / shops / restaurants / club all on your doorstep. Safe, beautiful and friendly place to walk everywhere which is a huge advantage over other areas of KL.
Valencia / Sierramas are other compounds close to your work location. They offer a couple of international schools, golf course, club, small supermarket. I have friends who love living there.
Coming in the other direction down to Bandar Utama. You have BSKL international school. Lots of housing and apartment options. Plus easy access to large shopping malls and trains. TTDI is an interesting area for market and restaurants, more local housing.
These places are all within max 20 min drive of your work. Driving around this part of KL is easy. If you don’t want to drive you could get ubers / grab cab / school buses.
Mont Kiara is another expat enclave, commute may take a little longer. Great schools and shopping. Beautiful apartments. For me, the traffic build up at rush hour would be too frustrating so we dismissed it. However, lots of friends happily live there.
Bangsar further away still, but could be done. Older expat area. I think of it as the original. Lots going on but with a young family. Personally, I think there’s more suitable areas for you.
Please message me if you want any more info. Good luck with your move. KL is very different to Singapore. Don’t expect the same or similar and you’ll be fine.