Depending on where and depending on conditions. Try to buy something that is being sailed in your local area, that way you have access to a knowledge base regarding your particular class of boat.
I would avoid the Hobie 14 as it is a class that is no longer being produced and has no active class racing. Plus it is not a very buoyant boat, severely limiting extra weight you can carry.
Windrush 14 is a good choice, still being made and a good class association and actively raced all over the country. In that vein, the Maricat 4.3 is exactly the same, good boat still being made and actively raced all over the country.
Lastly, check out
www.catsailor.net/ lots of nice people over there that sail beach cats and nothing but.