Best clipless pedals for distance or touring?

speedplay pedals, simply because they are the best ;) And a good set of road shoes. If your touring do you not carry shoes that you can walk around in anyway?

The knee friendly nature of Speedplay could definitly be good for distance cycling.

BeBops have the same non-centering design. But fit (just) on MTB shoes. As the cleat is pretty big, they dont seem to cause hotspots. I had these on some cheapish shoes, worked brilliantly.