If you're looking for an all-inclusive to Hawaii, check out Perillo Tours. They have 2 tours (I think a 7-day and a 10-day) to multiple islands, and their prices include airfare, hotel, admission to shows & tourist attractions, and most meals.
I also have to second TechAPhi's suggestion of Maui. We loved it! We stayed at the Westin on Kaanapali and it was amazing. They love to spoil their honeymooners.
We also spent a week on the Big Island and completely enjoyed that, too. I would recommend Big Island if you're looking to get a little more adventurous--horseback riding, going to Volcanoes National Park, "river-rafting," swimming with dolphins, etc. The Hilton Hawaiian Village is THE place to stay on Big Island. I don't impress *too* easily, and I was walking around that hotel with my jaw on the floor.
Yes, honeymoons are expensive...but the memories are completely worth it! We don't regret a single penny.