I was wavering for a while, and I think Im leaning toward the F219's. I tend to be moslty a XC rider weighing in at 185, I dont usualy race or anything, might get into it at some point, but who knows. The x317's are a light weight XC rim, but Im afraid I might dent and bend them a bit. For 20 bucks less a rim I can get the much beafier, but a bit heavier F219 free ride rim. I believe the weight difference is about 175 grams per rim. Will I really notice this difference in weight? or should I go with my gutt here and get the cheaper stronger rims? I have read the reviews and both have excelent reviews for what they are intended.