Well, we do have a 26 inch 1920x1200 lcd monitor already but tbh wed like to get a second and Id like to get a third. A three monitor setup is my ultimate desire running from two cards, and a physx. I do not know anything about how this can be achieved so If you have any tips or info or resources to share, thatd be great 
Usually it is said that if you are getting a multiple monitor setup, it's best to get them all together to have:
- The same revision
- Coming from the same manufacture facility
- Same internal components used.
Why?
Because, the back light lamp of the monitor. GE lamp (let's say) is not the same white as some other company lamp's. And a manufacture usually do buisness with several lamp manufacture to always ensure they have a continuous supply. Well the back light lamp of an LCD monitor is one of the things. A new revision of the monitor could mean the panel is different or different grade of the LCD liquid was used. Which can result in not the same colors. which is fine thing for an individual monitor, but when you have 2 or 3 next to each other.. you notice that your white is not the same on all other monitors. This is important for those who cares about colors. If you don't, then you have nothing to worry about.
Anyway, for your multiple display setup, you have different options.
- You can get an ATi/AMD Radeon 5000 series which has multiple outputs.
- You can get 2 graphic cards on the same system, allowing you to support 2 monitors (or in the case of the Nvida GTX 400 series, 3 monitors). Obviously more graphic cards, means more displays.
- Get a specialized card with multiple outputs like select Quadro's or Matrox (yea, they still exist) cards. Although these are usually uber expensive or provide very low performance, as they are not designed to be gaming graphic cards.
It all comes down to: what do you do, what do you expect, and do you game or not. Oh and budget.
