2016 Coachmen Catalina SBX 321BHDSCK, COACHMEN CATALINA SBX 321BHDSCK The Catalina SBX carries on the Coachmen tradition of being a leader to the great outdoors. The new Catalina SBX Show Buster Extreme is the ideal RV for those looking for a high quality camper with just the right amount of amenities often found in more expensive models. Catalina SBX makes camping affordable for every family.