roto molded boats have some problems, most importantly their tendancy to warp. There are several companies making them now, and they caught on briefly but have seemingly faded away.
I have been around quite a few Tatman style wooden boats and they are decent boats, however they are a maintenance nightmare unless they stay in a garage all the time and spend very little time on the water.
The best material which no one has figured out yet would be a kevlar woven material IMO.
Fiberglass does fine, and certainly takes some damage, but is easily repaired.
Mike Bone has built several boats over the years, and were true works of art. They have long since moved on to other homes, and he has gone back to glass last I checked.