You definitely want a good video card, but you can pick up an nVidia 660 or Radeon 6770 for under $200. You'll need that should you ever do anything, like games, that requires a dedicated graphics card.
why should he get that matrox thing if a <150€ ati gpu can run 3 monitors without any problems on its own? the TripleHead2Go seems to be something you'd use for a laptop.