I would never use a single foot triple mount and would only use a single foot dual mount if it was low to the desk as there can be quite a bit of wobble when typing or printing etc.
My current 6 monitor setup is using three Ergotron LX tall pole mounts for the bottom row and three Duronic gas arms on Duronic extra tall poles for the top row (Ergotron don't make any very tall mounts). This is very sturdy even when raising the height adjustable desk they're on.
I find the Duronic mounts extremely good for the cost and have a wide range of compatible parts, although they're not in the league of the Ergotron mounts for quality. However Ergotron doesn't seem to be keeping up with current needs for screen width and stacking and their only medium height mount (barely tall enough to stack 2 x 24 is only available in white!)
My current 6 monitor setup is using three Ergotron LX tall pole mounts for the bottom row and three Duronic gas arms on Duronic extra tall poles for the top row (Ergotron don't make any very tall mounts). This is very sturdy even when raising the height adjustable desk they're on.
I find the Duronic mounts extremely good for the cost and have a wide range of compatible parts, although they're not in the league of the Ergotron mounts for quality. However Ergotron doesn't seem to be keeping up with current needs for screen width and stacking and their only medium height mount (barely tall enough to stack 2 x 24 is only available in white!)