OK, the thing is that unless he's using material actually encoded for surround (movies, SACD etc.) there's not much point in going that way and paying for the three extra speakers. If he's using the usual office flat-panel monitor as a display you could either get a couple of decent, unobtrusive speakers to mount on either side of it or one of those sound bars that throws the illusion of surround sound. I can dig a couple of decent examples of both up for you if you like.