Another SPD vote for A530 from Shimano. SWMBO & I have toured extensively and have settled on those. I use Keen cycling sandals exclusively even in coldest weather. They are quite comfortable to walk in. If some more serious hiking is needed, I have on occasion removed the cleats for a climb on rocky terrain.
On one winter occasion I used plain pedals with a toe clip with waterproof winter runners. I have adopted that on the Brompton and is quite adequate.
