I just picked up a pair of Kuhl Slackr's, LOVE THEM. Most comfortable pair of pants ever. Their khaki is somewhere in between coyote tan and olive drab. The pants move with you, but are not baggy like 99% of tac pants. I swear I could do ninja backflips with these pants, that's how perfect they move with you. Gusseted in all the right areas. They also don't scream tactical, which is a plus in my books.
Also might want to check out the Kuhl Renegade's.
www.kuhl.com
Tru-spec 24x7's get the job done too, cheap for tac pants. Lots of pockets. Internal mag pockets.