In the Cut is considered her worst film, The Piano her masterpiece. I think Portrait of a Lady is brilliant, though, and horribly underrated. I really recommend you see it. Nicole Kidman and Barbara Hershey are fantastic in it.
Top of the Lake is way closer to The Piano than it is to In the Cut, as well. The visuals and cinematography alone are epic and more cinematic than anything else done for a TV drama maybe ever.