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

I’m using Gaia footers on an SVS PB 16 ultra on wood floors. I’m also using them on a heavy turntable. I’m very pleased with them. I thought they were a bargain at their price. I haven’t used anything more expensive to compare them though. They did tighten up my bass and kept my turntable from getting in a feedback war with my sub.  We were having terrible feedback at 90db, and it fixed it completely. No more woofer pumping. 

@captainsteve 
Not sure if you saw my OP mentioning that I have a concrete floor not a wooden. I can see how smitten you are with Townshend seismic podiums, though!

@celtic66 
Your comment is much appreciated and relevant -- I like your long distance thinking!
"Well worth investment for now and future speaker upgrades.  Mine were on carpet over subfloor."
Are you saying that the best solution (apart from Townshend) might be Gaia plust carpert spikes?
@stereo5  I see -- you like the Gaia II's on your carpet plus wooden floor; I'm trying to figure out the outcome on a concrete floor. I've heard those are very different kinds of floors to deal with. 

@hilde45

I have a hardwood floor covered by carpet and pad. I put down a piece of granite on the carpet and am using the Gaia 1’s under my reference 5’s. They made an immediate improvement. If your floor is concrete, I’ll bet you won’t need the granite. 😃

while I’ve rearranged my system, you can see the speakers with the Gaia’s in my Agon photos.

I tried concrete slabs and Gaia's ll under my Audiovector R6 arrete but  still had bass reverb you can do a Townshend search on the Audiogon  forum and read up on other members success with Townshend 

@hilde45     Yes, the Gaia work quite well doing all they need do.  For lots more money it's the Townshend.  If on carpet/rug the carpet spikes used in conjunction improved the sound as much as the footers.  Really a weird affect to me.