We went for the Lanx Australis 13w warm white dimmable, and landed for < NZ$25 (NZ$23 from memory). Since we had to patch and paint the ceiling I got my sparkie to install surface mount sockets so I could plug then in and easily work around them. Really happy with these lights, good smooth dimming and no flicker, its a nice warm light and reasonably low profile.
Do they give them the required markings for installation in a house in NZ at all? That's what I find annoying with the limitless LED downlights, hes importing them but not getting them tested and labeled so you cant put them in a house becuase of building regs.