I'm looking to purchase a new 27" iMac and Thunderbolt display for my office at work. I'd like to set them up with a VESA dual arm stand. Can anyone recommend a good stand that will: -Support the weight of both. -Provide at least enough movement room to be able to rotate both monitors freely -Ideally, I would like one that can be placed on the desk, clamped to the desk, or on a floor stand. I do not want to have to drill it into the desk or anything. -I am not against getting two separate stands but would prefer a single, dual-arm unit.