I wouldn't worry about the XR-200 if you're building them with a high spoke count. http://fairwheelbikes.com/kinlin-xr2...im-p-1214.html

However, if you are worried about their durability the XR-270 is more durable and still very light (mine were only a few grams more than open pros). http://fairwheelbikes.com/kinlin-xr2...im-p-1215.html