@laurencarn Congrats and welcome! I'm a Jamaica bride from 2011. We were married at Gran Bahia Principe Jamaica in Runaway Bay. We absolutely loved Jamaica and the resort where we got married as well.
I know the Iberostar has a good reputation. I found some reviews of the resort and have given you the link. You can also do a search up top for threads of the resort.
Are you working with a good travel agent yet? That's the first thing I would recommend. A good TA will help you with decisions and make recommendations, as well as help you stay within your budget and work with the budget you would like for your guests. The owner of this site is Wright Travel ad they are destination wedding specialists. If you don't already have a good agent I'm sure they would be able to help you out with information.
Good luck and happy planning!