Second Thoughts on the Ideal Cruising Boat
you might check the Bristol 35.5, they rate 150, have solid hulls, and are well built.
As to the subject of cored hulls, you can find a very passionate and through discussion at:
There are different points of view, that cored hulls can be kept Ok. But when we bounced over a rock last summer, I was glad we had decided to stay with all glass.