I have a bike with crank bros egg beaters, one with speedplays, and three bikes with spd. i cant say that i prefer one over the others. I just have more spd bike because thats how I got started with clipless. There is no significant difference in the degree of float between the cb and spds.. If you want the easiest walking stick with cb. If you want adjustable float that will sort of allow you to"tune" your foot position, you should be looking at speedplays. Walking with speedplay cleats is easier than the typical look or spd-sl road pedals, but is still a pretty big, awkward cleat. I have only used the speedplays with a road shoe, so there may be more walkable options available.