We are looking for a beautiful, romatic beach in Hawaii ( any island ) to renew our vows on the sand.....any suggestions?

i just got back from hawaii not too long ago, and it was beautiful. we stayed on the island of Oahu and my all time favorite beach i saw on the trip was Kailua Beach. it was the least crowded, clearest water, whitest sand, and most spectacular views i saw on my trip. the drive there from our hotel was even fun, we drove through the rainforest and saw waterfalls and really huge mountains. Also the nightlife on the island of Oahu is unmatched from what i hear of travelers who have been to all the islands, i have not had the chance to go to the others yet but i know oahu had a bunch of fun stuff to do day and night, any thing on waikiki beach is fun. have fun and best of luck!!
P.S. if you want some pics of Kailua i could email them to you or something.