This seems to be the only comparison site:http://www.telme.org.nz/ (although wasn't that much use to me)

So anyway, after much digging around and thought over a few hours I've created these as the choices:

http://www.slingshot.co.nz/internet
Naked Broadband Unlimited, $90/month
(initially my reaction was to AVOID when I saw "unlimited", however it appears to be on Geekzone the reaction to those who signed up has been very positive. However, it is very early days... only been available for a few weeks. Thus I'm sitting on the fence about this one unless somebody makes it clearer)

http://www.orcon.net.nz/external/genius/campaigns_landing_genius.php
Example cost: 40gig/month @ $95
A positive in their favour: http://www.orcon.net.nz/home/page/o_zone hmmm.... although they don't count TVNZonDemand any longer which was a big plus for me,http://www.orcon.net.nz/about/article/o_zone_-_a_few_changes

http://www.snap.net.nz/home/package/naked
Example cost: 35gig/month @ $60
A positive in their favour: unlimited free youtube for only an extra $2/month

http://www.vodafone.co.nz/naked-broadband/ultimate-naked.jsp
Ultimate Naked, 60gig/month @ $95
A positive in their favour: "you can double your data to 120GB for an additional $30.60, either as a one-off if you just need a bit more for the month or ongoing if you want to always have the extra data."

http://www.compass.net.nz/index.php?option=com_content&view=article&id=72&Itemid=96
40 GB Broadband $76.95 per month
60 GB Broadband $96.95 per month

http://www.worldnet.co.nz/personal/nakeddsl/
Example cost: 40gigs/month @ $69


So which plan?! Any positive or negatives I left out which should be highlighted?