Seth, several years ago we had a bunch of sailmakers come in to advise the Ches_Bay fleet about changes in sail inventory. Since then, we've kept a pulse on advances in technology. At that time, and reiterated since then, the belief was that a "high-tech" material didn't have significant life or speed advantages vice a woven dacron main for a boat with a main the size of a J/30. The key differences between headsails and a main, is that the main has to be suitable for all weather conditions and that the main lives its life on the boom, getting flaked or rolled. It may not be sexy, but it does seem to work well over time.
