Hi. We are planning to replace several pieces of canvas (cockpit enclosure, flybridge cover etc.) on our 50 Viking Sport cruiser. We have Stamoid now but have not been happy with how some pieces stood up in the Florida sun, especially the bow cushion cover and flybridge cover (went through 2 each in 6 seasons). We are choosing between a very dark blue Sunbrella and the off white Stamoid. What are your experiences or thoughts with the two materials particularly in the Fl environment. Breathability and trapping heat are the tradeoffs, but longevity is the biggest question mark.