Curacao is an EXCELLENT place to go.
If you're into snorkeling, then it's the place to go as many of the beaches provide you an opportunity to see fish and turtles.
Highly recommend Kas Di Piskado Purunchi as it's a little family place where you literally can sit over the water and see them clean and gut the fish prior to cooking it up for you.
Mambo Beach is a popular beach that'll cost you for chairs and the like but the calm water and okay food at the bar.
Equus is basically a place tucked away in a neighborhood where you basically get chicken, shrimp, or veggie kaboobs for the table. It was okay but it did have a nice outdoor area to sit and eat.
Fort Nassau is a fancy restaurant that overlooks Willemstad so you can see the sunset and possibly the bridge opening and closing.
Blauwbaai Beach is another beach where you have to paid to get in (It's free after 5pm) that is set in a fancy resort type area with large restaurants to grab food.
All in all, I recommend Curacao for couples and families. Tons of beaches, but you some are rocky once in the water. The place isn't cheap nor expensive so I'd say that you'd should expect to spend about the same amount of money as you would in the States.