The recommendation when purchasing a SUP is always try before you buy. The big retailers around Australia are now receiving their new stock of most brands and are currently running demo days or demo weekends. Fanatic and Naish quite often combine their days to give customers an even greater opportunity to try a larger number of boards.
If you're interested in demoing boards ask your retailer when their demo day is on. You can also check out the fanaticsupaustralia or Naishaustralia Face Book pages for notifications of their demo days.