get the corsair or a pc power & cooling unit if they're available in oz. you can't go wrong with either brand.
Yeah, I was looking at a Corsair 620w for AUD$172.00, as well as others, but the AcBels are slightly better price-wise and thus would allow me a more powerful unit for the price...
An Acbel 660w (True Rated) is AUD$126.90, and the 800w (Total Output) is AUD$189.90, and a couple of techies told me they've had no major issues with the AcBels and that some OEMs use them also.. they're also certified by Intel, so I thought they might be worth a look.
Nothing is set in concrete, however, and if the AcBels are proven to be not so good I will go with the Corsair 620w if it powers the new 9800GTX and Phenom II 920 (@125w) OK... otherwise I'm looking at an extra 45 bucks on a tight budget for a 700w