Ahhh yes a good point is that if a provider has ADSL2+ infrastructure in your exchange (3rd party DSLAM's) they may be able to provide a cheaper plan than providers using solely Telstra equipment (re:ADSL1).
This list shows WA exchanges and Providers who have 3rd party DSLAM's installed:
http://forums.whirlpool.net.au/index...iki&tag=AEG_WA
Also a link article on whirlpool how to choose a provider:
http://forums.whirlpool.net.au/index...Provider%20FAQ
Good luck.