We are looking at a Utopia SE and a Challenger 180 (both used). Does anyone have any opinion? We want to ski/tube, will use it in the ocean, and want the capacity to carry at least 5 or more people. Those of you who have a sea-doo: are you happy with it? Would you purchase it again? How much maintenance is the engine? How is it in open water? Do have any complaints/comments on the boat? Any suggestions are greatly appreciated. Thanks, julieanne