Living & investing here, I believe Palm Beach & Burleigh are go. This is also the same opinion of some analysts ie matusik, midwood, etc. They both have excellent beaches, great water access to fishing reefs & council is doing the areas up.
Palm Beach has expensive beach front in Jefferson Lane & canal front is also expensive. The ripple effect within the suburb is driving rents up & previous lower socioeconomic problems are being fixed through these increasing rents & increased social/police pressure. Upside capital appreciation will kick along when cafe society starts & Pavillions in central Palm Beach should provide this. Also train station will be a huge boost but this is 10 yrs away.
Of course Burleigh has well established eatery's, infrastrucure and this is evident by higher prices. But it is a complete package with the train station for Reedy Creek hopefully within 10 yrs. Budget will determine which suburb to buy in.
As with any investment anywhere in Australia - transport infrastructure is the biggest issue, & this is not a rapid easy fix problem.
Generally I view Burleigh as steady as she goes, consistent growth both capital & rental. Palm Beach is more on the cusp waiting to go up - it has expensive suburbs to the Nth & Sth. But when will it cross that cusp, who knows. With 1000 people heading here a week, and all wanting to get as close to the sandy stuff as possable..........