Hosting Drupal websites in New Zealand can be quite a hassle. Overseas, offer much more options and can be a lot cheaper but the latency sometimes is just not acceptable.  I tried using Rackspace but we ended up with WSOD so many times because of their server speed.

I've tried 247hosting.co.nz but they were really bad - guaranteed money back, that's a joke!! We are still waiting for our refund.  Just as a side note they also brought the webhosting review site and suddenly all the bad reviews about them disappeared.

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I've found a good hosting solution called FlexiHost and I can say without a doubt they are the best that I've ever dealt with.