Very exciting that you're planning a move soon! Having lived up here in Noosa and raising two young girls in the area, I can highly recommend Noosa, Noosaville, Sunrise and Sunshine. Great schools in the area, daycare facilities and close to the Noosa River and Main Beach - perfect and safe spots for young families. Coolum and Mt Coolum are also good - you may find you can get good value for money there, depending on where you buy.
Happy to help if you need any assistance or just have any questions. I've recently helped another Victorian family with their move. They arrive next month!