This might help you,
http://www.sailingproshop.com/catamaran_guide.aspxThe condition of used inexpensive catamarans varies wildly for not much change in price, so what most would recommend to look for if you don't care about what type of boat is what condition is it in. Also the Hobie 14 and I think Prindle 15 are mainly a singlehanded boat whereas the others you mention can be sailed singlehanded but are great for 2.
