We are wanting to travel to Costa Rica and need to use points to stay in one of these Marriotts. We are trying to decide which is the best for us. I want the best beach. We'd also like to do some siteseeing/excursions like cave tubing, ziplining, waterfall exploration. We are interested in culture and village-life too, not all time on the beach. So, with this information, which marriott is the nicest choice for us???