The best map I found was the National Geographic Adventure Map.

I was a little underwhelmed by Manuel Antonio. Although there's a lot to do around there, and the resorts along the road to MA have spectacular views (If you can afford it, definately stay at one!), but I thought there were plenty of other beautiful beaches. IT's good for tourist shops and restaurants and taking zipline tours and fishing trips and such, but unless you book ahead of time or have a lot of money, you'll be spending the night in Quepos, which is not as interesting and has lots of drug dealers and prostitutes.

The Monteverde area has lots of cloudforest preserves, Santa Elena is one of the nicest by far, and the one named Monteverde is a little overtouristed.

San Jose has some dangerous neighborhoods, so be careful in there. I knew a family who took me around to some restaurants, but you should be careful just wandering around - it's not a great place for tourists. YOu'll want to be in the countryside and beaches anyhow.