Wall mounted monitor arm

[EnsisTheSlayer]

So I'm looking for a stand for a 27" 4k monitor, and I want to do quite a lot with it. I want the arm to be able to swing above my main 21:9 monitor for multitasking and I want to be able to swing it next to it in a vertical position for coding, while the arm itself is mounted in the same place on the wall. Does this exist, and so could I have a link?

 

[geofelt]

Look at the ergotron monitors.
They are pricey but are of very good quality.
http://www.ergotron.com/Products/WallMounts/tabid/157/language/en-US/Default.aspx
Pay particular attention to the specs for lift , swing, weight, and rotation.

 

[little_me]

well, main monitor size was not mentioned but seems that most arms that offer height adjustment, are limited to 10 to 12 inches vertical at most, making it harder to do.
Alternately, I found one that has both carry capacity and enough height adjustment capability to do it right away. Downside? it's desk version.
http://www.ergodirect.com/product_info.php?products_id=17795
They also seem to have a wall mount version that can lift 20" vertically so.. it should be able to do it, maybe. It all depends on where the wall attachement is and how it bends to match the other screen.
http://www.ergotron.com/ProductsDetails/tabid/65/PRDID/788/language/en-CA/Default.aspx

in short, other products besides ergotron seem to have problems matching the desired mobility, not saying they don't exist but google-fu didn't really tell me otherwise.

Edit: geofelt was faster since I spent time googling