Where shall we move to in Brisbane?

Hi all. Myself and my girlfriend are moving to Brisbane in 2020. I'm 32 and she is 28. We both love the sea but are looking to live in a suburb a small distance away from built up city areas. Close to a beach would be ideal but also close enough to commute to the centre for work. We enjoy going out, socialising and fitness too. Our budget is by no means unlimited but we'd be on the higher end. Can you offer any advice on areas to look at? Thanks for your time, it's much appreciated.