Best rack for non-suspension turntable?

Garebear, if the resonances are truly being effectively channeled out and external influences isolated, the sonic result should be more harmonically rich as the crud is removed to reveal the real sound. Any true upgrade, as opposed to a juggling of colorations, should have this effect, ie. less hash and grunge/more natural detail. In my experience this does not usually translate as brighter unless natural brightness is being masked. Even then it is not aggressively brighter, just more revealing.

The big problem for the super-rigid or super-massive schools of TT isolation is that the continuous motion of the Earth's crust (and other sources of low freq. vibration such as traffic) forces the building's foundation and structure to shake, shake, shake. Unless the TT is decoupled from the structure/foundation, the TT is susceptible to low freq. vibration, even when placed on super-massive or super-rigid platforms.

Geoff Kait, Machina Dynamica

OK

You guys have me convinced in everything but spending the money. I am going to buy a big peice of granite or slate (as has been highly recommended by TW Acustic) stone and then sandwich it between 3 bike tubes and my current granite/composite shelf. I am then going to use the right amount of sorbothane to couple the shelves to my rack. This should do the trick. I have a bike pump for maintenance & leveling every 2 weeks. Should save me $3500 as the new Minus K for the big heavy tables costs about $4000. Thanks Nsgarch for the Panda link. This all makes sense & now I have money for camp tuition for this summer.

Also, I can't do a wall shelf due to location.

Go to your local pharmacy/orthopedic supply outlet and look for air cushions for people with piles. They look more like a wheel barrel tube, than a bike tube and seem to be really well constructed (think of the law suits and the size of those butts). Best of all, the nipples are on the outside, so you wouldn't need to disassemble your shelf (or get off your butt)to give them a top up. It should make levelling a lot easier too.