Hi,
I know a lot of guys here already probably have tanks installed in your schmick new houses. For those of us with ******* old houses ( ) Bluescope has a great offer on at present on a limited range of WATERPOINT SLIMLINE® and WATERPOINT CLASSIC® tanks (e.g. 2000L Slimline is selling for $990). Can be colour matched to the 25 Colorbond colour spectrum too.
Offer ends 31 Aug and then the price reverts to everyday RRP (which is nearly double IIRC ).
http://www.bluescopewater.com/index.cfm?objectid=2D08F380-A77A-099C-0E2E9B519837509C
ETA: they offer full install package too but this is ~$1500 and some of you handy types can no doubt DIY cheaper.