I'm getting married at the RIU ClubHotel Negril next month (6/5) its less expensive than the RIU Tropical Bay which is also located in Negril. I chose the RIU because it is all inclusive, you will have to purchase a wedding package (I'm going with the classic package for $695 USD) and that includes the officiant, bouquet and bout. for the bride and groom, ceremony decor, the marriage certficate, a champange toast and a semi private reception with a wedding cake. I figured you really can't beat that. My guests got a great rate on their rooms. A family friend just went to this resort last year and said she had a wonderful time.
Hope that helps, good luck!