I don't like the hard stuff... but I do like these
http://www.google.com/url?sa=i&rct=...JDFV-2Z5jAZDsyRD_Vvca6wg&ust=1374292534584882
rum is rum, imo, darker rum isn't harder, it's just more.... molassessy? For sipping it's less harsh than the white rum people like to put in fruity drinks. You might try to find a reputable rum tasting while you're down there