European Vibraplane?

Steve, I think we are actually in touch--you are getting quotations to EU for me :-)

Buying Vibraplane used or from SOS in US doesn't resolve the biggest problem which is shipping. Hence my search for an EU alternative.

The Vibraplane was a Newport Corp. microscope stand modified to provide lateral isolation in addition to vertical, not sure about the rotational directions, possibly rocking and rolling isolation. Since the Earth Crust motionproduces a lot of energy in the 0-10 Hz range, every Hz you can reduce the resonant frequency is important. Below 1 Hz would be outstanding. The number of directions of isolation is also pertinent. As I recall the Minus K has a resonant frequency of around 0.5. Now we're talking!

Yes, from the specs Minus K seems way beyond the competition. But I'm wondering if anyone has ever heard a difference between VP and MinusK (in a system with a serious bass capabilities of course...and probably with less than optimal floor, e.g. suspended).

Townshend Seismic Platform looks interesting, from UK.

http://www.townshendaudio.com/hi-fi-home-cinema-equipment-vibration-isolation-platform/

It's an interesting question which iso platform is The Best since a lot of the "art" of isolation involves how the platform is supported, how the component is supported and, like you say, how bad the situation is to begin with. We do know that Earth crust motion, in and of itself, is sufficient to cause problems. Halcyonics, a Swiss German iso table, is interesting and there's always Newport Corp. and TMC. Myself, I like hardened steel springs and heavy masses.