Since I am going to keep the platform under the deck on the floor, I think I will need either metal or possibly carbon fiber cones or maybe Boston Audio tuneblocks though I will try Mapleshade cork/rubber things too. I will go with either 4" thick maple from Mapleshade or 3" thick from Timbernation. And I will use Nottingham supplied platform for my Nakamichi deck with Polycrystal cones under it.
I am ready to sacrifice some warmth in sound for better dynamics though I won't tolerate any ringing.