I personaly like my Optus Cable.
For $65 A month (Thats priced down due to Optus landline/mobile) I get 12gig on peek (12:00pm-11:59pm) and 24 gig off peak (12:00am-11:59am). Although, the new optus plans are more then that (20gig on/40gig off) but I like my 4 free months.
Optus upload is capped at 32k/s (Which has a funny story behind that.. the result was I got banned for a week after I took down a node..) which is fine for most things expect running your own webserver.
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DSL can be cheaper but it is slower. The new ADSL2 lines are in most locations on iinet and are as fast/faster then cable but more pricy.