Speakers: Isolation?

Try Primacoustic Monitor Isolation Pads. They have different sizes to suite the size of your monitors. I use flat RX7 model and they are the best in terms of bringing focus and separation of instruments to my speakers. They only cost $100 each so its not a heavy investment. I even use one of them under my REL sub to great effect. They have been designed for the Pro market. we all know that whilst Pros are prepared to spend $$$ on equipment its not the price that drives them rather positive effect on the sound.

Also take a look at this page:
http://www.primacoustic.com/reviews/recoil/

I'd suggest maybe something from Herbie's Audio Lab. Just go to his website and see what he has to offer. You could even send him an e-mail asking for his suggestion. He is very quick to answer.

I've been looking at the roller blocks and can't figure out how a heavy speaker sitting on these will not pose a risk of speakers bumped off.  Doesn't look like there is much of a "platform"  Am I missing something?

The heavier the speaker, the more inert it will be on top of Rollerblocks.  Have a look at my system, you will see I am using Rollerblocks double-stacked.  You just have to be careful when in the vicinity of the speakers.  Keep in mind, Rollerblocks are to be used in 3s, so that you get a three-point stand and then let gravity do all the heavy lifting.

@james1969 so the metal ball is sandwiched between the top and bottom puck?  Thanks!  I'll check out your profile and look for your picture