Re: sailcloth: laminated or woven?
If you don't race you don't need a laminate sail. Modern dacrons are light years beyond what they had 30 years ago. You will get plenty of life out of it, and it will hold it's shape for a long time.
As for mold, I don't know what to tell you as I have never experienced the problem, however I am one of those people who believes a headsail should not be stored on the furling. It exposes it to the elements far too much. It really isn't very hard to drop the sail and flake it as part of the routine when returning to the dock after a sail. Take care of your sails and they will take care of you!
1979 Santana 30 Tall Rig