Is that due to the floating strings and not being set into grommets? What is a good durable yet spinny string? I guess it is also personal preference also.
its basically due to the speedports that the strings break. if you want a durable spin string go for a polyester, such as pro hurrican tour. polyesters are stiffer strings which transfer less energy back into the ball. you therefore are forced into a higher swing speed which will generate more topspin. pht also has an octagonal profile, so it grips the ball better