another idea
We purchased padded, sunbrella seats with a back rest that ratchets to different angles. We face these seats forward when sailing but they are also comfortable in the opposite direction with their back against the bulkhead facing aft. We store them below in the evening and place them on the starboard and port cushions for relaxing below. Ours were about $90 from Fawcets, Annapolis, but I've seen them for under $40 from a mail order catalog. Granted, we don't sit as high as we would in a stern-rail seat, but we're under the bimini and in reach of the controls. Plus, we can take them off the boat for relaxing on land or can take them forward to sit on the foredeck while at anchor.