I am demoing a set of GAIA IIs under my PSB Synchrony One towers (Krell KAV 250 preamp, Bryston 9bSST amp). I did a back and forth with the stock rubber feet and the GAIAs. I do hear an improved difference in the music. It sounds bigger, not as muddled on the low end. I don't know what "sound stage" is. I can say the sound feels like it fills the room better, and is much more dynamic. I will end up ordering a set of IIIs (the right size for my speakers) when I can.
Isoacoustics Gaia Speaker Footers
Replacing the spikes in my Soundocity outriggers (Soundocity made me a set of outriggers with threaded holes) with the Isoacoustics Gaia 2 footers has improved the sound of my Merlin VSM speakers. They now sound more open and articulate than with any combination of Z-feet or other spikes, with or without outriggers, on the floor or on a platform, that I've tried. Like the Townshend products the Gaia footers completely decouple the speakers from the floor, allowing them to float. See:
http://www.audiostream.com/content/isoacoustics-gaia-isolation-pucks#IVXH8EtVAjQdwbuj.97
http://www.isoacoustics.com/products/gaia-series/gaia-i/
http://www.audiostream.com/content/isoacoustics-gaia-isolation-pucks#IVXH8EtVAjQdwbuj.97
http://www.isoacoustics.com/products/gaia-series/gaia-i/