Great posts, gents. I recently went with the Arnott struts as well and haven't had any issues. Only thing I would add to the discussion is to rebuild the air box while you are already working on replacing the air struts. It's a fairly easy thing to do and because they can get buildup over time, it doesn't hurt to have it cleaned out. It is located in the inner wheel well of the passenger side.
On a side note, I also added the Johnson Lift Rods to my Rover to add larger tires. We'll see if the rumors are true that it wears out the air suspension over time.