The stock wheels are OK. They're nothing special, but there's also nothing wrong with them as far as I can tell. If you're worried about them, maybe have the LBS check them for even spoke tension. That's often a problem on machine built wheels. Mine did quite a bit of pinging for the first few miles, which is a telltale sign that they weren't properly stress relieved (a potential source of spoke tension problems). I did a little tweaking to get them right and didn't have any problems with them in the 500 miles that I used them. I only switched them out because I had better wheels hanging in the garage waiting to be used.

If you go between off-road and road riding very often a second set of wheels and tires makes life much easier. If you go that route you need to take measures (or have your LBS take measures) to make sure the rotors line up the same way, but it makes tire changes quick and painless.

If you have the cash and want to upgrade to something nice my recommendation would be Velocity A23 rims with SRAM X.9 hubs and DT Competition spokes. QBP's Handspun brand makes these for a reasonable price, though I don't know if that means they're available in Australia. I have those rims and hubs separately and like them both a lot. I'm using the X.9 hubs on my Jake with Salsa Delgado Cross rims (discontinued), and those have been great wheels for me. I've got over 4000 miles on the wheels with the X.9 hubs and they still spin like the day they were new and haven't required a bit of maintenance. The A23 rims are a good bit lighter than the Salsas I have, but they're plenty tough. I used them for CX racing last year and had no troubles.