I have the Icon Field Armor Knee/Shin Guard
And sport this very sexy look on my way to work
Not sure I could make any recommendations. They are simply hard plastic with a soft foam backing velcro’d together at the back. I wouldn’t expect them to offer much protection or necessarily stay on in a high speed get off. I only use them on my commute which is 3 miles on city streets. Max speed of around 40 for brief periods. They work for me as it means I don’t have to put on my motorcycle pants (not overpants). It’s a trade off between convenience and protection but for my brief ride they are more than adequate.
The Bohn armor looks nice but I’ve invested in Rev’IT jacket and pants for my main rides. They offer good levels of protection (at least webbikeworld thinks so) so I’m okay for the time being. I may get into off roading later this year so I’m eyeing some hard armor myself.