welcome to this new world of kids schooling. yeah I know your dilemma. I was there once. I can suggest you few schools.
If top notch education is your top priority then go for Iben-Sena College DHA. Yes, you heard it right; "if" top notch eduction is your top priority! It seems, while I was doing research for my kids, that it is NOT a priority anymore for many parents. I talked to many parents with kids in beacon house and other. They told me that education is ok but not at the best, couple of other complains like too much extra curricular stuff BUT they still want their kids in same school because of brand name! And I was like...huh?
I suggest you talk to some parents and get their feedback. Not all branches of same school are same. Some has good faculty and hence good education quality, some are other way around. Go check with schools. Check their policies and pick which suits you best.