First a BIG WELCOME to the fold! No matter what Cat you pick you'll have a lot of fun. Second, don't limit your choices! Ask for a test ride on all of them, then go to a race or two and get a few more rides on other boats. All the boats you mentioned are on the smaller side except for maybe the Inter 17 and unless you have munchkins as buddies four people might be to much for all of them. The Wave is a very slow Cat and the 5.2 depending on the year maybe a nice boat. The early 5.2's have a center tube on the tramp and it can take it's toll on your knees after only a short time. I like the Inter 17's and they should be the best single handed boat of the three you mentioned. If you have any dillusions of flying a hull with four people on any of these boats see a shrink. Even 20 foot catamarans find 4 people a very big load for fast sailing. Test a lot of boats before you decide. <br><br>