Just got a 9 outlet Breezair evap put into my 4x2, been doing the job very well since the start of December. Haven't got my first power bill with it yet but it's supposedly worth 40c an hour (give or take) to run. Pretty cheap compared to a reverse cycle worth around $1 an hour to run! House has been very comfortable since getting it (used to just have a 3.5kw wall unit) and its pretty silent too.

Got it through my uncle, he started an aircon company a few years back, that does everything from manufacture of the ducting all the way through to install. They're a bit busy at the moment, but he's always happy to take on more work.
He normally stocks panasonic ducted units and can put them in at a decent price, but can get anything else requested.

His business website is =http://gmtair.com.au/

If you go through him, mention my name (Jeremy Toland) and he will look after you.