I,m on Telstra cable unlimited.
and have to say if you can get cable go for it!!! its pretty much as fast a connection as you can get. The only bummer is that on my account after 10 Gig it drops to 56k which is very gay.
But 10 Gig is alot of downloading goodness, but i know i could push it heaps further if i could. If ur downloading heaps 10 Gig might not be enough. I approached an Optus retailer and was pretty much told that cable was the way to go.
Hit cable if you can!!!
Merman