Can the surface be flush or will I need to tuck the edges behind each other? It's possible to tilt two monitors on the same bar to make the edges mate smoothly, but not three unless they are mounted at different depths. A short center bar with longer arms (2 on each side) would in some ways seem to work better than a long center (3 on the same bar).
I thought about the 2-1-2 option for bar placement. However, that would tend to give you a fairly big "V" effect, and the long arms would be unwieldy and have a high risk to throw the unit off balance.
We are working on a kit that will give you two options for the "middle three". I'll look to see if we can "tuck the bezels" to help hide them. However, because the panels are rotated portrait, you have a much narrower width on the horizontal and the angle needed to "tuck" would be pretty harsh.
The two options will allow you to either have the three middle monitors completely flat to each other (and then the outer monitors at and angle to that set), or put a small amount of angle between the middle three (so the angle on the outside monitors doesn't have to be so harsh).
Ergotech has two types of pivots - regular duty and heavy duty. The heavy duty are about an inch shallower that the regular duty. We are set to include one fixed HD for the center, then two HD adjustable pivots and two regular pivots.
If you arrange the pivots as such (on my 5x22"): HD-R-HD-R-HD, the center monitor sits about an inch behind the monitors in the #2 and #4 position. You then angle the 2 & 4 to meet the center monitor, producing an angle of about 12 degrees. I then set my outer monitors with about 25 degrees, giving me an overall angle between the center and outer of around 37 degrees. However, this produces a more gradual parabolic arc that I find pleasing.
If you arrange the pivots as such: R-HD-HD-HD-R, all three middle monitors are completely flat to each other and provide a very large SLS. You can then angle the outer monitors to your liking. You could end up with the same 37 degrees, but the outer monitors would be at a much "stronger" angle.
I also find the smoother arc in option 1 to help offset the issues from the TN panels. That slight 12 degrees takes away much of the wash-out in the #2 & #4 panels.