Following much of the advice here, I chose the A520 pedals for my Casseroll. I took them out for the first ride today, a 50 miler. I am very impressed. The pedals are easy to engage and disengage. The attachment is more solid feeling than with the Crank Bros. pedals I had been using and the float is not as free. The best feature is that the sides of the pedal come in contact with sole of the shoe so there is very little rotation in and out along the pedal spindle. The Candies allow quite a bit of this rotation which is not a problem for MTB riding, but disconcerting on the road.

The A520 pedals are not as solid feeling as the Look pedals I prefer for aggressive road riding, but a big step in that direction. I think they will work very well for the kind of riding I intend to do on this bike, where the need for improved walkability warrants sacrificing some of the pure performance considerations preferred for the fast ride bike.

The Shimano MT32 shoes are also proving to be comfortable; stiff enough for riding while flexible enough for walking.