What is the bast wall mount for monitors

Hey there, I'm looking into changing my PC gaming setup from a desk setup to a couch and wall mounted monitors but I have no idea what wall mounts to go with. I need a mount that has as much maneuverability as possible. I don't really want to spend more then $100 per mount unless there is a mount that can hold two monitors on one unit. I live in Canada so if anyone can provide a Canadian price that would be great. Thanks in advance.