Just giving you food for thought... No one has mentioned northern gold coast schools...there are quite a few private schools around Coomera, ormeau and the one my DD will start at next year is at yatala, Rivermount College, it has a lovely country feel. I think lots of the schools that have been mentioned you will struggle to get a child into for next year, as we did!!! Because there are quite a few schools up the northern end of the coast I think demand is slightly less.
Most of the private schools here offer a great education, it just depends on your religious beliefs and what values you would like your school of choice to 'possess' if you know what I mean.
In terms of state schools, there are also lots with great reputations. I'm a teacher and I've come to realise it really depends who you talk to. I've taught in state schools where I would never send my child, but then heard a parent say how wonderful it is. Such a personal choice based on an individuals experiences.
Have you thought about where you would like to live/ work? Surely you don't want to be traveling far for the school drop off?
We are actually moving before the start of the school year to be closer to our school (tho we wanted to live in that area eventually anyway) because I thought it important to be closer considering the length of time children go to school.
Good luck with your school hunting, it can be so daunting.