Which international school (Houston)

We are moving to Houston towards mid of the year. Most important decision is where to send the kids to school. Our kids are 8 and 11 and go to an IB school in Asia. They are also in a bilingual program with German. I've been looking at the British School, AWTY and the Woodlands prep. Can anyone tell me a bit more about those schobols? From just the website research, I am leaning very much to the British School, but the location of AWTY or Woodlands is much better as DH's office will be close to the Airport. Also I would love the kids to continue their German language education.