LG 5k2k - Question regarding setup 2nd monitor

Hi guys,

I just ordered the new LG GX9 ultrawide monitor for my home office. However, I already have a 27 inch 4k OLED which I still want to use as a second monitor.

• Should I place the 27 inch above the ultrawide or in portrait to the side?
• Would 2 separate monitor arms be the most optimal?

Thank you in advance for the answers/suggestions!