All four of those boats are great boats. It sounds like you've really done your research and narrowed it down from the huge list that everybody (including myself) was throwing at you. All four boats are quality (some good, some great), all four will perform (some good, some great). Just go drive them and demo them like you plan to use them; # of people, all of your gear, use all of the storage and seating (and don't let the salesman tell you he'd prefer you not to bring anyone or any gear - he (or she) isn't buying the boat). And enjoy making the decision.
Oh and about the industry being that cut-thoat? No. It's just that there are that many poor salesman in the industry. If you don't know how to successfully sell your own product, try to knock the others down to make yours look better.
Good luck with your decision!