I've used Cybex. It's alright, but not real impressed. Nor am I.
I have not used the other 3 as far as I remember. For the combination lever/pulley machines I have used Nautalis. Original Nautilus
The original Nautilus make by Arthur Jones was good quailty equipment.
Jones sold it long ago. The New Nautilus is a different animal.
The quality is questionable and the service rivals ICON.
Gear Trends Mangazine, a fitness equipment magazine for retailers, won the "Worst Service" catatory for a number of consecutive years, back to back to back.
In the last survey Natilus garnered a 40% in the "Worst Service" category. No other company came
The commercial division isn't any better.
I've used a lot of Hammer Strength machines of those varieties. They're pretty nice. Hammer is part of Life Fitness. Hammer is a good product.
Hammer was Gary Jones' (Arthur's son). Gary sold it to Life.
Life Fitness has good equipment and very poor service.
I've used Flex Fitness machines too, which are also pretty nice.It is.