Ergotron makes some of the best mounts around.
I've used the LX mounts for a few different monitors and have had no issues.
They also have a variety of multi monitor mounts including dual, tri, quad, ect.
Oh I know the internet is not private, but for the average company I'm wondering how they are getting this type of info. Assuming you don't add anyone you work with, and keep your profile to friends only... they shouldn't be able to see much correct?