I wear blue jeans for my work pants and I found "Rustlers" to hold up better than Wranglers and are cheaper to boot.  I order mine from Walmart--used to get them from KMart.  Somewhere around $12/pair or so.  Any Wranglers I ever had ripped way too easily.  Oh, and BTW,  I've been finding my pants "shrink" in the winter months and then "stretch" back out in the spring when I start doing more.  LOL