Aloha from Hawaii rick726!
What are you looking to do on your vacation? This will greatly influence which island you should visit. Also, how many points are you looking to burn? My personal favorite is the JW Marriott Ihilani in Ko Olina; unfortunately the property will cease operating as a Marriott in 6 days. There are, however, many other options on Oahu, Kauai, Maui and the Big Island.
If you're looking for a get away that's more "country" than city and aren't looking for shopping + dining, Kauai and the Big Island would be the best. Lot's of nature, little development, etc. As you know, Maui is a great mixture of unspoiled nature and development with shopping and great dining. Of course Oahu, my home, has a ton of dining + shopping options, plus a good amount of natural activities. Waikiki is very crowded and noisy, but Ko Olina is secluded and quiet.
For reviews on some Hawaii properties, restaurants and more, please check out my Insiders Blog: Hawaii & Beyond!