With the addition of a third monitor to my setup, desk space has become an issue. Do any of you use an articulating arm to support a 30" ACD? I'm looking for a device that clamps to the desk (no holes to drill). The only thing that looks remotely acceptable is the Ergotron MX, but there are a number of reviews that make me question whether it will be able to support a monitor as large and heavy as the 30" ACD.