If you're adding 2 monitors, all you really need is a Dual card. I would not go to the expense of a Quad card, unless you plan to add even more monitors later. If you have an AGP slot available, the AGP Matrox P-650-Dual Card is a very stable card. If you need a PCI card, you can go to the Matrox web site and see what they now have. I'm not familiar with their dual PCI cards. TC