All the new models are using Navteq maps, which (I believe) is a first for a dedicated device in Australia (I'm sure you'll let me know if I'm wrong). There's also a cool tech called instant GPS fix, which recalibrates the expected position of the satellites in the sky every three days to get your position quicker. Plus, each of the new models has a 2 year warranty.
The entry level Moov 300, which will have an RRP of $349, has a large, 4.3-inch widescreen display. They've rejigged the interface as well, so you get large icons (like TomTom and Garmin devices). There's text to speech (so it reads out street names for you), which is a nice addition to an entry level unit.
But it's the mid and high-range units that make the new Moov range interesting.