which can be the best school for my son?

We are planning to move to doha in near future...thanks to QL,I get most of the information I require to settle there. I had lately been looking for schools for my 4 years old son, ASD and Doha English Speaking School seem good, I need some member to help me to decide for one epecially those who have experience with these schools or any other school which is better reputed than these two.I will be so grateful. And one more thing can somebody tell me how long these school keep children at school i mean daily schedule. I could not find this info on website