What's the best place for a honeymoon in the South Pacific? Price not important.?

Fiji!

Cook Islands

Philippines, you choose from 7,100 islands with different cultures and lots of beaches with abundant marine life.

Vanuatu is AMAZING

Four Seasons, Maldives. Check out this site: http://www.fourseasons.com/maldiveslg/. The service is impeccable, and the trip is a once in a lifetime experience.
BUT, if price is truly not a factor, you should NOT go to the south pacific, but instead, one of the most beautiful places in the world: Dubai, United Arab Emirtates. Two hotels there are world class, literally. Burj al Arab is known as the greatest hotel in the world, but very pricy.
I recommend the Ritz Carlton Dubai. Here's some information, it's to die for: http://www.ritzcarlton.com/resorts/dubai/

Tahiti..

There's an index of Pacific Islands which link to individual pages and tourism sites at the page below. Have a look around.