First of all those are badass amps you are running! The Metaxas industrial design is super cool! No comments on the speakers except to say looking at them in terms of drivers and specs if you truly want more bass slam that rules out the Joseph Audio and Vivid. Both good speakers but both look a bit bass shy compared to your PMC’s. B&W, Dynaudio, Magico, and Legacy all look like they will help in that department. Beyond that its up to the how they sound to you!