Palm Beach, Aruba or Lahaina, Hawaii?

My husband and i are planning a vacation this summer and have gotten mixed reviews about palm beach and Lahaina. Cost isnt an issue, and we want great beaches with lots of things to do. I'm worried that Lahaina will be extremely crowded. But, Palm Beach seems like it doesnt have much else to do but casinos and isn't nearly as beautiful as Hawaii since it's a dessert island. If we choose Lahaina, we would stay in a condo on Sugar Beach. If Aruba, the Marriott in Palm Beach. Anyone been to either of those? Please help!