Originally Posted by Laconic
DFW? I'd go with AD1s, Dariens or Darien Lights. Buy them a little big if you want to be able to layer up during the cooler parts of the year. I wouldn't buy a lined pant for summer use where you are. Lots of folks like the Klim stuff as well; one pant they make has vents on the thighs which looks handy for hot weather. I don't remember which model though.
My Klim Traverse pants have zippered vents on the sides, and then on the backs of the legs. Not sure if that's the one you were thinking of....
I also think their Mojave and Dakar pants have zippered vents, also.