I'm currently using a set of these in the UK
http://www.systemsat.co.uk/satellite-lnbs/inverto-black-single-ultra-0-2db-high-gain-low-noise-lnb.html?gclid=CM2I3-CRvrkCFcbLtAodxRAAaw
and the signal is amazing (up to 16dB on the Dreambox 800) where the normal signal rate is around 10 to 11dB.
Are LNB specifications any different for NZ (to be used on the Optus D1/D2/C1 satellites) or are these bad boys good to go?