I am also new to clipping-in. I currently have some low-end Shimano pedals where both sides can be used for clipping in or riding with regular shoes. I'm having issues with knee pain, so I'm interested in alternatives. What would you recommend if I want to have the choice of using my bike shoes with cleats or regular shoes? The Frogs that I've looked at seem to be strictly for clipping in.

Thanks.
tb