S40 is great as a fast tourer, and with a triple up front on 30 x 32 I've been up 14% on a lightly loaded tour. Its a good overall riding position for me, within the envelope of compromises that every recumbent works with.
One thing to remember is that import duties are higher on complete bikes than framesets, so self build can be a good option. I had my frameset delivered to my US office when I had a trip there and saved cost that way.
As above, if being used on the road, tours, audax etc then finding the sweet spot between speed and controllability at low speed, hills, traffic lights etc is important and will vary with both bike and person. I sold my M5 because I wasn't fully comfortable mixing it with traffic at low speed around roundabouts, junctions etc with a seat that low and more limited forward vision. Despite higher seat height its easier to get a foot down on the S40.