Angela,
I also thought the Under Armour Proto Power Trainers would be best for step and KB (the description emphasizes cushioning for impact). The Speed Trainers seem geared toward running, and the Proto Evades fell like they have a lot of lateral stability, but they did not seem to have enough cushioning in them when I tried them on (for me and my sore knees, at least). Anyway, when I checked the UA website, it looks like they only make the Proto Power Trainer for men. I hope I'm wrong, but if I'm not, it's not fair!!!!!!!!!
Let me know if you, or anyone, find the Proto Powers for women. Like you, I'd love to try them.
Have a great day!