The Ergotron HX is a heavy-duty monitor arm ... the extra sum just to get that ergonomic boost alone. This is a dual-monitor arm that can carry two monitors of up to 22 pounds each.
If you need something that supports a larger display, the Ergotron LX Desk Monitor Arm is a better choice. And if you're on a budget, this Amazon Basics Monitor Stand will get the job done for not ...