bushwalk through rain forest in NZ

[showstoppa]

Hello,
I`m from Poland and I`m planning my trip to NZ, South Island. I`m looking for a daily track/walk through rainforest in the south island, what can you recomend me ?
thanks!

[dagsands]

I know this is an old post and my reply will likely be irrelevant for the OP, in case anyone else is interested, the Abel Tasman coast track is great for rainforest. Although it isn't virgin RF.
Can do part day, full day, 3 or 5 day (or in our case 6 day). Huts or camping. Beaut beaches and coastal scenery too. Its in the north of the South Island. Closest airport is Nelson. Rated moderate - some bits easy some bits straight up/down. Had perfect weather first week of March (lucky us!)