Columbia ROC pants
I have 5 pairs of these pants. They are awesome. Durable, comfortable, multi-purpose- those are the appropriate adjectives for these pants. They look good enough to wear with a tie when I'm teaching, and the function very well when the activities get more strenuous. I teach in them, and I do SAR work in them. Keep in mind, they are cotton. You don't want to use them for extended backcountry trips. They don't dry fast. They are, however, excellent day-to-day pants and are as versatile as they get.