I really loved the resort I stayed at in the Dominican Republic. At the time it was called Sunscape the Beach but I think its Dreams Punta Cana. We enjoyed the food, especially at the Dreams restaurant and it had great locations for wedding receptions. when we went about 3 years ago, it cost us $2000 for the entire trip, which was a 4 night stay.
Good luck with your planning...choosing the resort is absolutely the hardest part. It is much, much easier to make any decisions after that!