I'm purchasing my 2nd 27" monitor this weekend, and am in need of a quality monitor mount.
I'll likely add another 1-2 monitors over the next year or two, so I'd like to have the ability to mount these as well.
I'm interested in value and functionality most of all. Price is important as I'd not like to waste money, but I've no real upper limit as long as added functionality can be justified.
So no 1% increase in performance for 50% increase in price etc. The less I spend here, the more I can justify for other components such as a raid card or extra monitors.