At work, pretty much the same as you, DELL + 2x HD Screen.
When working remotely from home, I use DELL as side screen, and I mainly work on a Corsair One Pro + 2x 4K screens. The rig is powerful enough to have Photoshop and/or Illustrator running at same time when creating an XP.
When in need of opening 2 Experiences (most of the time for copy/pasting some parts), I just start 2 Composers and copy/paste between both, very handy 