A Sunova JR or a Firewire TJ would have good durability. But finding one second hand would probably be hard.
Since your in Qld, there's always plenty of good LB deals on gumtree. Annoys the hell out of me all the time

I'd just go a respected brand for about for about $600. CW are great boards, but your pretty spoilt for great LB shapers over there.
Edit: I'd snap that 9'3 whale bone up from Chrispy. I have one, they're awesome boards!