at the moment the demand far exceed the supply for seats in schools. if at all possible i would recommend you visit the school before enrolling your child, if you can find a place. as you can expect the schools often have a strong religious approach, some of the schools you have mentioned might be difficult for western expat children. currently the problem seems to be worse for younger children. my advice to you will be to make sure that you children have secure a place in a suitable school, before coming here.