+1 for the Stretch Zion.
Durable, comfortable. I wear them all the time.
As for fit through the thighs, I would not describe them as "relaxed" but they are relaxed enough that they fit me ok. I have really thick thighs, and they are a tad snug, but not uncomfortable or restrictive. (This is true of just about every pair of pants out there, however. If they fit my waist, they tend to be snug on my butt and through the thighs.)
Also, these are one of the few climbing pants I've seen that are available in different inseam lengths.