If you're looking for comfort and the ability to sit up straight, look at cats with wings. That would include the Hobie Getaway, the 18 Turbo and the 17. I actually think the 16 is a very comfortable cat compared to many of the other cats out there. You're not sitting right on a fiberglass hull, you are on the side rail or on a comfortable tramp. Put some carpeting on the side rails to soften them up a bit, that helps alot. There are kits for that in the Hobie catalog. Or just get out on the wire!