What is the best video card for setting you 3 monitors on windows xp (office uses)?

I am trying to set up 4 workstation with 3 monitors. Each computer has a videocard that already support 3 monitors ATI radeon x1300 but i am trying to add a third. Why video card should i get, i only have pci slots left.



thanks|||any of the lower end 5000 series from ATI would work, i'd say the radeon 5450.