Recommended monitor setup for a Creo Engineering workstation?

Hello,

I would like to know what the current recommended monitor setup is in a highly professional Engineering environment.

We have been providing our Engineers with configurations like

1. one 22”wide screen (1680x1050-WSXGA+) combined with one or two 19” (1280x1024-SXGA)
   up to
2. two 24”wide screens (1920x1200-WUXGA)

Two questions:

1. What is your current preference/standard?
2. What are your experiences with 24” UltraHD-4K(3840x2160) screens?
   a. Is the resolution too small ?
   b. Any issues with Windows DPI Scaling?

Thanks in advance.