You would be far better off living in the Holland Village vicinity as the school bus journey is not too bad at all - and better yet, Napier Road changes it's name and becomes Holland Road just after the US Embassy/Gleneagles Hospital & Botanic Gardens. Holland Village is approx 1 mile westbound from there on Holland Rd, just 5 minutes by car and about 10 mins on the numerous bus services. I guess your husband will be working at the US Embassy? Read the other postings here about the family moving from the States with teenagers - but you will surely have a real expat experience meeting other nationalities living closer to town and all the amenities rather than being stuck out in Woodlands.
There is a *huge* choice of condos near Holland Village, esp in the vicinity of the junction of Holland Road and Farrer Road. The SAS school buses go up Farrer Road onto the expressway to the school, so it is a popular location. Also consider Arcadia Gardens, but not so good if you don't have a car. Unless you know what your monthly housing allowance is going to be it is difficult to give names of condos worth checking out - they all vary a lot depending on size, age, facilities etc.
I would think that Woodlands is likely to be a very boring place for wives unless you want to spend half your time in the car to go to town for shopping and expat association get-togethers and the excellent attractions in Holland village!