Was recently looking for some OzBargain ADSL 2+ deals and ended up finding this one from Spintel, signed up today for the 500GB (more than enough for us). Unlimited is $5 more.
The good thing about this one is that there is no lock-in-contract, set-up fees or line transfer fees (line activation fees apply for new lines). My understanding is that 'Urban' refers to it being an Optus port.
Be prepared to potentially sacrifice a bit as Spintel is known for congestion during peak time and infrequent network dropouts, most likely would not suit a power user or somebody who values speed and reliability. Having said that if you are not satisfied you can always port out (30 days written notice).
Also get up to $25 credit through a referral (thanks Holysmoke for pointing this out):
https://www.ozbargain.com.au/wiki/spintel_referral_links
Also get up to $25 credit through a referral:
https://www.ozbargain.com.au/wiki/spintel_referral_links