Need advice re: appropriate docking station for home office set-up

Nov 27, 2018
Hello, I'm looking for some guidance about a home office set-up. I have the following monitor:

Dell UltraSharp 27 4K Monitor: U2718Q (inputs: HDMI, DisplayPort, Mini DisplayPort)

As well as two laptops I need to be able to connect to the monitor (not simultaneously...but they should be able to be easily swapped out for one another):

-Lenovo ThinkPad x1 Carbon 3rd Gen (outputs: 2 x USB 3.0, Mini DisplayPort, HDMI, headphone/mic combo jack, LAN, OneLink connector, Lenovo ethernet extention connection, and power connector - I can't find the name of this specific type of connector)
-Lenovo ThinkPad x260 (3 x USB 3.0, RJ45, Mini DisplayPort, HDMI, 4-in-1 card reader, 2.5 mm mic/headphone, and same type of power connector as x1 carbon)

I need to find a docking station that will meet the following criteria:

- supports 4k monitor
- compatible with x1 Carbon 3Gen and x260
- charges laptops during use

I've been trying to figure this out on my own for a long time and am very confused by all the different variables. Anyone able to recommend a dock? Open to Lenovo brand or a 3rd party dock. Willing to purchase adapters if needed. Thanks so much!!