Right, CFL=PL. Product designation would be PL-13 for a 13w, PL-9 for a 9w, etc. PLs are one or more tubes in a U shape. I prefer these type of CFLs as opposed to the twist-in, medium-base A-19 replacement types for a number of reasons.
Although LV definately has it's advantages, such as ease of wiring (direct burial as opposed to PVC conduit, etc.), I find the light isn't quite as brilliant. The required transformer also presents another link in the chain of possible issues down the road.
Whatever you decide, good luck!