The Canon Pixma MP780 is a solid, midrange all-in-one that offers a smart feature set with full faxing, good paper handling, and low cost per page printing, though no networkability.
The entry-level Canon Pixma MP160 is a decent all-in-one printer for the price, but don't be tempted by the entry-level machine: the Pixma MP180 costs a mere AU$20 more and provides the same print quality and a ton more features.
The Canon Pixma MP450 is a basic all-in-one printer that delivers great features and performance for the price. We recommend it for home users and amateur photography hobbyists.
The HP Photosmart C6180 all-in-one tries to be everything to everyone, and ultimately it fails to meet this lofty goal. It's a good printer at a decent price, however, for the home user who wants to consolidate all tasks into one machine.
The HP Photosmart C5180 is a perfectly acceptable photo all-in-one, but you can get more features and faster print speeds for the same amount of money.