You can find details on the wedding package offered at the Suites at http://www.iberostar...s/Weddings.html. There is also an email address you can use to find out if the date you are interested in is available. I booked at the Beach and used their wedding email address on their site with quick turnaround. It was about 5 days from the time I sent my initial inquiry to the time I had my date booked.
All of the Iberostar resorts are in the same area. The Grand is going to be the most expensive, is adults only, offers more amenities such as butler service, and allows you to have access to the Suites and the Beach. The Suites is the middle option which allows access to the Beach. The Beach will likely be the most economical but does not allow you access to the other two resorts. All resorts have a beachfront area. Hopefully that helps