are 4 X 3 monitors even available anymore?  I use 3 older Samsung 19 inch LCD 4x3 ratio.  I was able to find 2 of the same model on ebay for less than 100 each 2 years ago.  My set up brings resolution to 3840 X 1024, older screen res but with the 3 it really immerses you into aces high.  The video card I use is a mediocre hd Radeon 5850 I with eyefinity.  I was trying to go triple monitor on a budget and got it done with a stand for around 500 bucks. I would suggest getting identical monitors if at all possible it makes the color matching a lot easier and has a much cleaner look.