There are two reasonably new "condotels" there that are nice.  One has a
mini kitchen, the other doesn't.

Caye Caulker Condos at www.cayecaulkercondos.com was pretty good, but not
super fancy.  My notes indicate it was $100/night on the lower level and
$120/night on the upper plus 9% tax.

I can't remember the name of the other one, but as they are on the main road
that faces Ambergris Caye, and they are near each other.  Check out the Lazy
Lizard while you are there.  A nice hang out bar.