Welcome mate, Just a bit north of you at Forster!
With the type of sailing you are likely to do out of Port Stephens, Newcastle etc I wouldn't look to far past a Bonbridge, My father had one built new (the builder
was Mike Bannel if I remember correctly and they were built in Sydney
just up near thornleigh) and they were built strong as the proverbial.
Another to consider (although a little more expensive - you will be amazed at the offers people will accept these days) is a traditional 30 (Built by Mike Barrett at Terry Hills in what is now the the Buizen factory I think), significantly bigger volume, nice turn of speed and capable around a twilight course or an offshore
wander - not as strongly built but they knew more about fiberglass
by then so still strong - more than adequate
Whatever you choose - tell us and post a lot of photos!