I have 4 screens in a 2-up 2-down configuration. These are the old type with 5:4 aspect ratio and 1260x1024 pixels. I use each side-by-side pair as if it were a single wide screen and normally have a single window stretched across the width of 2 screens. If I could afford it I would replace each pair with one 21:9 widescreen.

Sonar's Track View is displayed on the top pair. The bottom pair is for PRV, CV or whatever (sometime docked in the undocked Multidock), depending on the Screenset. Whenever I need to have another program open and visible while running Sonar, I just "maximize" the bottom window so that it appears in the lower-left screen only, leaving the lower-right screen free for other uses.

Twin 24" here.  I work 90% out of the box for mixing so I rarely use console view except for submixing.  I like having a nice big multidock in the second monitor that is always the same size whether doing midi editing or melodyne etc.
 

 

CBJ
Currently I use a pair of 27" HP monitors to display Sonar 8.53 but want to see how other users implement a dual or quad monitor system? Since my current setup is 50" across it takes up a lot of real estate & all I currently do is stretch Sonar across the entire 50" width which is fantastic, but I want to do more if I can. This setup provides the ability to show the track info on the left screen & the clips on the right screen so it's nearly perfect, I think?
 
I've been toying with buying 2 additional monitors & placing them above the current ones to provide more real estate to display effects on the left upper monitor & Virtual Instrument plugins on the right upper monitor.
I don't know if Sonar is capable of this approach using Virtual Monitor mode that can provide this type of split or if this is the right procedure / terminology to implement this way of displaying all the info at once?
 
I've investigated buying a 55 or 65" LG 4K UHD Oled TV & the resolution would be 3840 x 2160 (total) which would bring in each quadrant to display a resolution of 1920 x 1080. This would be fantastic as long as I can display the contents in the way I have described previously. Another scenario would be to utilize a 3 way split with the top 1/4s each utilizing 1920 x 1080 while the bottom would display across the entire TV @ 3840 x 1080. This would allow me to stretch Sonar in the same way I currently stretch it across the 2, 27" HP monitors. Is anyone is utilizing this type of setup I would appreciate any & all feedback on this topic.
 
Regarding me using Sonar 8.53 I have explained my issues with my eyesight in previous posts & even though I own Sonar X3 I can't see many of the light grey fonts being used on those versions, so I rely on Sonar 8.53 because the color scheme is very vivid & provides the contrast that I need. I work for 12 to 14 hours every day using Sonar 8.53 so I put my eyes through Hell every day. The X1,2,3 all incorporate a lot of greys & pastel shades similar to Pro-Tools & old Commodore (which I ditched back in 1992) so I cannot see the detail control info that I need to make any adjustments.
 
Thanks to all, & Happy New Year!

I own a 65 OLED.  I would not consider using OLED technology for something that has a static shot until the technology is tested over the long haul.  It is known to have burn in (for sure at least temporarily).  If you are working 12-14 hours a day, that seems like it would be abusive to this technology.
 
Considering how expensive it is, I'd do research on that as part of your evaluation if the risk is worth it to you.
 
They are awesome for Film appreciation though.