Thank you for the detailed replies.
Unfortunately I don't have the Thunderbolt 3, just a DisplayPort over USB Type C.
I want to clarify that I always work with the lid closed. Now I have the LG ultra wide 34" (2560*1080 @ 59hz) connected using the HDMI port of the laptop.
So basically, my only option is connecting each screen to its own port on the laptop (one HDMI and one DisplayPort over USB Type C), since the DP over Type C won't be able to handle the bandwidth.
Please correct me if i'm wrong
Are you certain regarding the bandwidth issue? I was close to ordering the WD15 dock anyway