A couple months back, I got rid of a 25.5" x 3 Surround setup. Was not a fan of the fisheye effect and didn't see why the side monitors should be the same size as the center - and effectively larger, given the way you angle them - when the center is supposed to be the focus. Also didn't like being stuck with one monitor in all the games that don't work with the technology, especially since the Asus VW266H lacked the brightness and clarity of an IPS.
So I switched to a single 30" for gaming with two 22" in portrait for web. A couple weeks ago, I toyed with the idea of trying triple monitor gaming again, but this time with mismatched monitors and a LED TN Asus VE278Q, which is a much better monitor than any TN I've seen:
Happy to report that it works really well in FPS, which is what I primarily play in Eyefinity. Because the side monitors are smaller, the fisheye effect appears less obvious. And because the center monitor is larger, it is more natural to focus on it. I don't feel any loss of immersion from the side monitors being smaller. Instead, the sides now offer immersion instead of distraction.
Absence of bezel correction does not bother me in the least - and I was very bothered by its absence when I was using identically sized monitors with that feature turned off. Again, probably due to where my vision is focused.
Meanwhile, the 30" at the bottom is still great for non-compatible games.