As above Whirlpool.net.au is the best source of info. I'm a regular there.
You might do better with one of the bundled Internet & phone services.
Optus & aapt do good value bundles.
ADSL2 is both faster and cheaper if you have access to it. You can do a search to see which providers are in your local telephone exchange. Then look up their web sites or call them to discuss plans/prices. Here is one of the better sites to check for ADSL2 availability.
http://www.adsl2exchanges.com.au/
Just note with ADSL2 the further away from the telephone exchange you are the slower the speed you will get.
With ADSL1 you can get up to 8000/384k speeds now. So that's still an option. Same deal though, you can only get close to 8000k speeds if you are next door to the exchange, the further away you are, the slower it is.
You can also look at Cable(Bigpond & Optus), although it's always priced at a premium compared to ADSL.
Also the general rule is that the faster your Internet connection the more data you will transfer, so the more usage you will require. Just human nature, especially if you have kids.
There is also VoIP(phone via the Internet), but it's not for the faint hearted. Huge savings can be made, but it can also cause huge heartache.
I have two broadband connections here for redundancy & capacity. aaNet 8000/384 ADSL1 & Bigpond Cable Extreme 17000/256. I don't have access to ADSL2. I also use VoIP for both personal and business use. But then again I'm a geek.
