Sunrise for sure. The sunset up there is pretty bland. Even the sunrise you really need to be there on the right day to catch the colors.
All 3 pieces are very vibrant and are finished with a UV varnish for protection
Oh and you should try that hike up that path in January and February. The hike itself is intense as the water gets 3 feet deep and higher in some places. I want to go back to get better waterfall photos of Waimoku Falls. It's so tricky though as you need to camp overnight at the 7 pools so that there aren't so many tourists lol.