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Ergotron LX vs Mount-It! Dual Arm
Which should you actually buy? Here's our verdict.
The case for each
Ergotron LX Desk Monitor Arm
Why it wins
The LX is the monitor arm other arms are cloned from: fluid one-hand adjustment, a genuine 25-pound capacity that doesn't sag, and a 10-year warranty the company actually honors. It turns monitor position from a furniture decision into a gesture.
Watch out for
Very light monitors (under ~7 lbs) can't compress the spring enough to stay put without tension adjustment — read the manual's tension section before assuming yours is defective. Clamp depth needs ~2.4 inches of desk overhang.
Mount-It! Dual Monitor Arm
Why it wins
Two monitors floating off the desk for the price most brands charge for one arm. The MountUp dual frees up the whole desk surface, brings both screens to eye level, and makes repositioning effortless — the single biggest ergonomic win for a two-screen setup, cheaply.
Watch out for
Match your monitors' weight to the arm's per-arm rating or you'll fight droop. Cable management is basic versus premium arms, and very large/curved panels can collide in the middle.
Our verdict
One premium arm or two budget arms for the same money. The Ergotron moves like furniture from a much more expensive store and will outlive several monitors; the Mount-It! holds two screens adequately but you'll feel the difference every time you adjust it. One monitor you reposition often: Ergotron. Two monitors you set once and forget: the dual Mount-It! is the pragmatic call.
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