Hi, Tim. Though BDR cones have rounded tips, they do very well with Cone/Spike Decoupling Gliders. Thiel speakers, which often tend to be a bit on the harsh side, do very well with Cone/Spike Decoupling Gliders also. You never know until you audition in your own environment, but I would bet that BDR cones/Gliders would be the best combination.
For the amp, four Iso-Cups w/SuperSonic Hardballs under the amp should do very well either on the slab or on the bare floor. Four or five 1.25" grungebuster Dots (or "Thin" Fat Dots) under the slab would be beneficial. I don't see any reason to not use the maple slab; it looks nice and has potential to have some sonic benefit depending on the vibrational environment.
Herbie's Audio Lab