I am with www.aanet.com.au
I have a 1,512/256 plan and currently pay $45 per month, as I signed up when they had a special on.
Their current 1,512/256 plan with 8Gb download is $55 per month, with a 6 month contract.
https://www.aanet.com.au/plans.htmlHave a look at
http://bc.whirlpool.net.au/ for some other options.
Optusnet seem to have a similar plan for $49.95
But look out for the ADSL2 options, if available, best I have seen is 24,576/1,024 for $39.95 per month. But I don't think it is available in our area yet :(