After 4 nights in Koh Samui, we will be spending 2 to 3 nights in either Koh Tao or Koh Phangan. I would love to hear which island people recommend. We are in our early thirties and will be on our honeymoon traveling in early September. We want beauty, nature, beaches and marine life. I know Koh Phangan has more nightlife--which we aren't really looking to tap into. I know Koh Tao is awesome for diving. We aren't licensed but maybe we would learn there? In short, which is a more stunning island for a beachy tropical honeymoon stop after Koh Samui? Thank you!