I have 2 monitors, a Prism + 340 pro, already on an Arc Stealth Pro, the other, an AOC, on a cheap swing arm. I decided to extend my existing Arc to the second monitor. A bit expensive at $69, the quality, durability, and appearance is worth it. Besides, those who see it will know you are not cheap!
What had already surprised me were several aspects. The Arc Stealth Pro was several things - the build quality, neatness (the clip mount with a hidden Allen-bolt), classy looks that embody both modern and tech looking, and incredible customization of placement of monitors. The ability to swing at different length and angles gives a lot of flexibility to move the monitor, and I move around my monitors a lot.
The VESA clip-on is super convenient without the need to unscrew the whole monitor back plate. The clip stand can take 2 more monitors, but I don't think I will be using more than 2. lol
Now that I have identical monitor arms, the AOC monitor will be replaced by another Prism + 340 pro if all goes according to my fantasy! A shout-out to the staff at support@prism. Their phone and email-follow up is damn prompt and courteous.