Fed up with iiNet, Switching to Another Provider, Any Recommendation?

Long story short, I am fed up with iinet and other TPG subsidiaries. My list of complaints is long from their customer service. billing problems, and the locked Fetch TV trick.

Does anyone know a better NBN provider that is cheap (I only need 20MBps), and the router does not require VLAN ID Setting (because I would like to keep my router). A bonus would be if the customer service is in Australia.

I have shortlisted a few, and wondering what you think.
Aussie Broadband - rather expensive. More expensive than IINET, so that's a no.
Belong - cheapest at $55 a month on contract, but can't find any information on how to setup the router.
Tangerine - never heard of this, but it is recommended on Whistleout.

Edit, there seems to be debate about tpg subsidiaries, here is the full list from wiki:
AAPT
PIPE Networks
Chariot
Soul
Vodafone Australia
Lebara Australia
IntraPower
iiNet
Internode
RuralNet
Country NetLink
Origin Internet
Octa4
TransACT
Grapevine
Westnet
Netspace
Adam Internet