Husband and I will be in Costa Rica January 16th- 26th, 2013. Neither of us have ever been to Costa Rica. We are early 30's with no kids. We want to have a good mix of both relaxation (beach) and adventure. We had talked about San Jose, Arenal, Monteverde and Montezuma. However, since we are novices we are looking for any advice you have. We definitely want to see wildlife, rainforests and beautiful beaches. For the beach atmosphere- we want laid back with some activity in the area but not overrun with tourists.