Which Herbies would you recommend for X-3’s on hardwood floors?
I would call Herbies for the best suggestion for your situation. But off hand, if you want to keep your spikes I would suggest the Cone / Spike gliders. Or, if no spikes, the Giant Fat Gliders which is what I use. Both give you the benefit of being able to easily slide your speakers into place if you wish to move them to the wall after a listening session; or for easy adjustment. BTW, I had the Gaia's and sent them back to Amazon and saved a chunk of cash. Both did a nice job of isolation but I could hear no difference between the two products.