Field Of Dreams

Okay, Im currently planning Anthony and my Honeymoon for March 2008..
So far it is between the following destinations:

Koh Samui 
Langkawi 
Fiji 
Tahiti
Mauritius
Maldives

We have been to the first two places, but none of the rest...
Does anyone have any reviews/suggestions for me? 
Have you been anywhere that would constitute a romantic, tropical, secluded honeymoon destination?

Thanks for the help :)

xoxox