Interesting discovery when my carpets were cleaned yesterday!

I have some bookshelf speakers that sitting on some Dynaudio Stand 20 speakers stands. They are each filled with 50lbs of lead shot and my speakers are attached using some blue tack stuff (it helps hold them in place kind of like mounting them with screws). 

Anyways, while having the carpets cleaned I removed the Dynaudio spikes that came with the stands so that the speakers would be easier to move around as a whole because they weight 110lbs-ish each. 
When the carpet guy was done we put the speakers stands on some foam blocks to keeps them off the wet carpet until it dried. 
Later that night after getting the speakers dialed back in (I have certain measurements to get them back to where they were), I kept the foam blocks on the stands until I know they were right. 
Well, it actually sounds better with the foam blocks than the spikes. So now I’m on the hunt for something to actually use instead of the spikes. 
My room is carpeted  with carpet padding underneath on a second floor (a wood sub floor). So I need the ability to lock them down so they won’t get knocked over as I have a five year old. 
I’m not sure which type of feet I should use. Should I isolate or what what?
I don’t think I’d spend tons of money on something like this but I want to see what you guys would say. I’ve looked at the Gaia II feet and although they seem to come recommend I would prefer not to see them being silver in color...don’t know. 
Ideas?