If I had unlimited funds, I’d put everything on platforms such as the Minus K or Newport microscope tables, or folkfreaks Herzan. The closest a poor slob can get for relative peanuts is with a set of roller bearings and Geoff’s springs. The middle ground is where the Townshend Seismic Pods appear to have no competition, even from higher $ offerings from makers of somewhat high-priced devices claiming isolation, but in reality producing coupling below about 10Hz. The Herbie isolators are more in the nature of Sorbothane or Navcom---rubber pads, with a not-terribly low effective range. The rubber is actually reactive in the low-teen frequencies, leading to the common complaints of soft, spongy bass when isolating with rubber products.
Audiophile recording engineer Barry Diament uses roller bearings under all his recording and monitoring gear, even his Magneplanar MG3.7's! He recommends air bearings in addition to roller bearings, but is concerned his Maggies would be too easily knocked over with them in place. That's where the Townshend platform comes in---it is made in sizes commonly found in speaker enclosures, and can be secured to them for worry-free use. The Pods are available separately, and can be bolted onto the bottom of Sound Anchor speaker stands. I plan on doing exactly that to the SA stands my Eminent Technology LFT-8b speakers are bolted onto. That will create a stable tripod footing, and isolation to around 3Hz. Good enough for me! Folkfreak as well, apparently, for he has Townshend Seismik platforms under his very nice speakers.