Last time we were in Jamaica (Sept 2011, Ocho Rios) I really enjoyed the coffee, but didn't bring any home. We saw small burlap bags of Jablum Blue Mountain coffee (1lb I think?) but had read it wasn't necessarily the good stuff, and that sometimes people take it home and find out its undrinkable.
When we were leaving, we also saw that you could buy huge vacuum sealed packages of coffee at the airport, many pounds. Don't remember the brand(s). Considered it, but didn't because I hadn't researched it.
Any advice? Truth is, I don't know all that much about coffee beans.