Best Isolation Device for Speakers?

Thanks for the responses. I am wondering if anyone can speak of A/B direct comparisons for these products. Speakers are an interesting problem, perhaps because they are designed to resonate. I would think that isolating them on ball bearings would degrade the sound, being that they are more free to move in the horizontal plane. I know that testimonial and others experience would suggest this not to be the case.

There are alot of very long threads on the isolation vs. coupling theory. I thought this thread would be useful because it pertains specifically to speakers. I don't have the time or money to try all the different approaches. I know that some have put alot of thought and time into this stuff, and I wanted to learn from their direct experiences.

More specifically, I am wondering if anyone has experience with the Mana speaker stands. I am going with Mana for the rest of my equipment.

Thanks,
Rob

I went throught the same ''search'' about a year ago.....I own a pair of Avalon Eclipe's and as a result of new Berber carpeting in my listening room, the spikes that were supplied by Avalon just didn't raise the speakers up off of the floor enough. Which can be a problem, it is my understanding that some of ''these'' floor standing speakers SHOULD NOT be raised up that high because of their design and the listening height. Comments on that would be apreciated, because I have heard that putting a slab of Polycrystal under them helps greatly .....Anyway, I believe that ''decoupling'' is the answer and I went with the 2'' Audipoints and they did improve the sound and seem to be the right height

Rollerblock Jrs. work well for me. Sharper attack transients, tighter bass, larger soundstage, enhanced intrumental tone/harmonics/reverb.

I have to admit being a bit confused about this subject. I recently replaced the spikes on my Alon Circe's with a set of Walker Valid points and Resonance discs. The discs are sitting on a 3/4 inch piece of MDF which rests on carpet above a wood floor (basement below). The improvement has been substantial, which I attribute to the speaker not vibrating with the floor. In particular, the imaging is more precise and the bass is tighter. Musical details are clearer.

But I've been told different things about whether I should use a maple block below the speaker or a softer wood like redwood or pine. The theory for the latter is that the softer wood would remove more vibrations from the speaker.
Any ideas?

Randy