I can tell you the Hobie Waves are great boats; easy to sail, very stable, and virtually indestructible. They can easily take 2 adults and 3 or 4 kids at once. They like high winds, but are kind of slow in low winds. They tend to be pricey, even used; because people don't often re-sell them. You can get lots of info about them here and on the HobieCat.com forums.

I've never sailed an Aqua Cat, so someone else will have to tell you about those boats.