What's your budget? But honestly, my advice would be don't go to Punta Cana. I'd personally pick somewhere else in the Caribbean.
I stayed at the Barcelo Bavaro Palace Deluxe last year. I would recommend it to a beach and sun lover.
My parents go to Punta Cana once a year, they always stay at the same resort. This is the link for it: http://www.barcelo.com/BarceloHotel...bavaro-palace-deluxe/general-description.aspx
They love it there because its an all-inclusive type of thing.. when you land a driver is right there waiting for you to take you to the resort, the food/drinks menu is very broad and they take care of your needs 24/7.
Hope that helps!
My clients like Casa de Campo.