Any recommendations for how to setup a Ultrawide monitor for work and a smaller ultrawide for gaming

I’m looking for my next monitor, and was initially considering the LG 39 that will be released soon, but then Dell released their 52" ultrawide in 6k that is very appealing for productivity.

I’m tempted to go for the Dell, and keep my Alienware AW3423DW (old but still very cool and beautiful). Problem is my desk is 180cm wide and I don’t have a lot of extra space.

My question is: is there a monitor arm that has some good extension that I can use to move it around my desk and move the Alienware for example on the top when of the Dell when I’m not gaming, and putting it in front of the Dell for example when I’m gaming? Alternatively I could consider a smaller screen for gaming, but I play mainly non competitive games now, just for enjoying the graphics so I still want a monitor that has a very good display.

Or should I just forget about that and go for the LG 39" 5k2k? The Dell has a bit more of screen space but I could also live without that.