I also like the urban chino (pictured left in the "british khaki"). 100% cotton, the pants were originally $48, now $39.99. They are also available in a "diesel" color which I think it a bit too casual for the office.
For the top half, there is this "diagonal cord blazer" (pictured right). 100% cotton; it was originally $140, now $99.99. The pictured brown is the only color available.