Id recommend 5:11 tactical's ripstop TDU line of pants and shirts. I will put mine up against ExOfficio or TAD any day.
http://www.511tactical.com/All-Products/Pants/TDU-Pants/TDU-Pants-Ripstop.html#019
They are light, treated with DuPont stain and water Resistance. Ive used mine while fighting fire, medic, rappelling, skydiving, rescues, hunting, etc. They are now my go to "adventure" pants and shirts incredibly comfortable. Id recommend buying from Galls.
http://www.galls.com/cgi/CGBCSTYL?PMSTYL=TR336
Used by military, and emergency services personal all over the world.