Solid setup, to say the least.
Where I disagree with some posters however, is with the statement that a portrait multi-screen set up like this is akin to playing with two black pillars in your field of vision: This video, like most others I see, has its multi-monitor set-up in such a way that the image cuts out at the edge of the screens, resulting in there being nothing rendered "behind" the bezels. From what I saw of Eyefinity options, there's also a mode which results in the driver "hiding" some of the game behind the bezels, which of course results in losing some visibility, but also avoids objects which span across monitor boundaries being stretched through the bezels. It also eliminates the crazy break in any diagonal lines which span across 2 screens.
Now that would be more like have a wide view spanning 3 screens with some vertical pillars at the bezel junctions, as in a car for instance.