Under my tower speakers -- Isoacoustics Gaia, other options?

I am considering the Podiums for my 185lb speakers. I live in an semi-active seismic area (San Fernando Valley). I currently use Legacy spikes on a very thick carpet/pad over a 12" poured concrete 3000psi steel reinforced slab. The podium could add greater stability and probably more defined sound (it’s already quite good).  However, the C type podium at $1800 price is 75% of the price of my speakers.  Probably worth it.

I tried Gaias (borrowed from a neighbor) under equipment. I prefer Ultra SS Stillpoints and Synergistic Research MigSx. I have ordered Pods for my CD transport and Platforms for both pre-amp and amp. It’s possible to upgrade my vibration isolation with Townshend products. I’ve been using the wonderful Seismic Sink under my terrible non-isolating VPI TNT VI for 17 years (pump it 5 pumps every six weeks-no big deal).

Have you seen this video where three guys try the Townshends, Gaias,and Prime Acoustic platforms? It's very long but informative as they try different configurations. The floor is concrete with wood overlay.

I watched as much of it as I could. 

It's tedious,yes.The men aren't exactly dynamic personalities. But I could definitely hear the differences in the tracks they played with the different products installed and was surprised by which combination I preferred by the end.I'm actually beginning to start the process of trying different footers and platforms. My floor is wood over a basement though so not applicable to your setup.

@jtcf Thank you for positing this.  The video confirms what I heard with my first set of Pods under my CD transport.  I am pending receipt of Platforms for my pre-amp and amp.  (I have a 17 year old seismic sink which is essential for my VPI TNT VI-otherwise, I would replace it with a Platform).  

The podium prices are reasonable for most speakers.  The use for the subwoofer could be enhanced with a plate covering the cut-out logo in the middle of the podium.  As is, it's obvious that downfiring woofers or ports could react negatively to the cut-out.