Further to Kal's point, at a dealer demo, I expect that the Velodyne set-up will be poor.
I've never heard the SMS at a dealer - but I have heard the DD subwoofers demoed (albeit a few years back). If you ask the dealer how the EQ works, they will generally say - "one button" and demo the automatic EQ mode (which sucks). It's possible that this is just a sales pitch and that they go back and do a manual set-up (the only method that works, IMHO) after you leave, but I doubt it.
Marty