Casso said...hilly said...laceys lane said...
wouldn't pro surfers go full carbon if it was good for surfing
+1
+2
Not relevant as unlike 2" thick pro shortboards, SUPs don't flex enough to matter

I agree pohaku, custom is the way to go if you can find a shaper you can develop a good relationship with and get something that suits you. Most productions boards for me are either too wide, not enough rocker or too fat in the rails - and yes I have tried quite a few.
Back to the question, I always liked a combination of Carbon/'S' glass, gives rigidity combined with impact resistance.