Not that it matters, but just because I don't understand some of your reasonings against clipping in - Having size 6 feet makes no difference, because I have size 6 feet and ride clipped. I have issues with tracking in one knee, but I use speedplay frogs which have enough float that as long as I have my saddle at the right height my knee doesn't get irritated.

Zen'll chime in, but I think she really likes the SKS half clips.