The first thing that pops to mind for me is to survey your current clients to see which one they would want to have available for them to use. They are the people who will use it so you want to purchase something they want. I used to work in a gym that had a versa climber and it was almost never used. I remember one woman who loved it, but very few other people used it. In my current facility after treadmills the most popular piece of cardio equipment is the Cybex Arc Trainer.