I've just finished staying at the Conrad Koh Sumui and have the AMEX Hilton Honors card, but I decided to use the Chase PriorityClub Visa because I don't want to pay the foreign conversion fee. I could have used the Chase Marriott Visa or the Capital One Visa to avoid the fees also. I think this was the better option than the extra points with HHonors.
-outoftown, posting from the Crowne Plaza Bangkok Lumpini Park