While setting up my new rig I tried a number of setups.
I'd bought an LG 43'' 144hz widescreen monitor, which I thought if not used on the sim gaming rig I could use for other games. I also have two 1080p 24 inch monitors.
First try was with 3 screens, widescreen in the middle. It was ok, but a pain to set up, as I rapidly found out that all three monitors have to be the same. I also had to downgrade my Nvidia drivers as the newest one had a glitch that would only support two monitors. Eventually I got it working, and while it was nice, the stretching of the central monitor to match the outer two was noticeable.
Then I tried with three similar resolution (1080p) monitors. It was OK, but for open wheel stuff the bezels were really noticeable, plus the apparent distortion on the side monitors I found a little distracting, at lest at first.
Then my boss (nice guy!) decided we should upgrade our work monitors and bought six new 2560 X 1440 BenQ monitors. I took the opportunity to borrow them (well, three of them) and tried a triple screen setup with that. despite the extra resolution, I found that it still didn't wow me, if anything the fact that the side monitors accentuated the stretched look was worse.
I went back to a single 34'' widescreen at a lower definition, and realised that for driving at least, those side monitors were not actually adding to the gameplay sufficiently to make their inclusion worth it. I actually found the single screen more immersive as there were no distractions.
Lastly I tried TrackIR with it, and this was better than the two side screens once set up properly.
In the future, I may splash out on a higher resolution and larger ultrawide screen, but certainly for now I'm ditching a multiple monitor setup and sticking with a single ultrawide and TrackIr.
Just my five pence worth
Les