I'm definitely a Clyde and definitely ride tough-on-the-equipment trails, I've got an F219 on a CK hub front wheel with over 3k miles on it and still straight and true. The rear wheel is currently a matching CK hub with the XM321 ... had some b-a-d pinch-flat inducing rock-hits a bit over a year and a half ago when I had an F219 on the back and I finally got tired of the not-quite true, not-quite round wheel and got it changed out.
I've got 'em built up 32-spoke, double-butted spokes, all goodness for me. Could be lighter, but I'm not sure I care.