Has anybody else heard about the new flagship Def Tech speakers? From just a low-end bass standpoint, does anybody have any ideas on how this new def tech speaker would compare to the JBL Synthesis systems or the Velodyne HGS-18 sub? I know the def tech is a full range speaker w / a built in sub and the synthesis is a complete system, but if you could give me a low end comparison, that would be great. I am deciding between the 3 systems for my new ht. Thanks for any help.