You'll want AMD cards. You'll need two. Either two of the 5870 Eyefinity 6 edition cards, or two of the newer 6xxx cards. They support the newest Display port standard, and can output 5 monitors at once.
You'll want AMD cards. You'll need two. Either two of the 5870 Eyefinity 6 edition cards, or two of the newer 6xxx cards. They support the newest Display port standard, and can output 5 monitors at once.