My experience is of comparison between the 18" Mal-X and the 18" LMS's, TC-2000 and TC-3000/Axis motor, and JL F112 - and now a Submersive HP.
The Linear motor tech is def worth hearing IMO... And IMO a step above the rest.
One can easily come up with a design for a box to suit the different needs you may have.... Its not that big a deal to design a box...