Concentrate first on finding a quality loft having expertise with the 5.2. They should be best suited to sort out materials with you based upon your sailing priorities.
Regardless, a poorly cut/designed sail will perform poorly no matter what material it is made from.
If you have the interest in reading all about materials check out the cloth manufacturer and loft sites below:
http://www.quantumsails.com/products/tech.asp?PLID=1http://www.contendersailcloth.com/index1.asp?Sid=3&SHid=612&SWid=1004http://www.dimension-polyant.com/e_docs/home/home_fr.htmhttp://www.epsails.com./http://www.sabresails.com/article2-1.htmThere are others. I have found all of the material have trade offs. Just a matter of what you consider to be your top priorities.
Sail fast, Tom G
