turntable isolation feet

As mentioned above, you didn't name the TT you have. But I use Aurios under my LP12 and they work fine. Before I had an rega P25 and used AQ Feet.

I also use Herbie's tall Tenderfeet under my Linn, which is a suspension TT. No more footfall and the sonic benefits are tighter bass and a more open sound.

I have Thorens TD145, Clearaudio Bluemotion, Dual 1019, and Garrard 309. Garrard is with an old plinth and I am replacing it a new plinth. I will use Ortofon RMG 309 arm, and in the future, I will have an SPU cartridge. All other tables are with stock plinths and feet, and I don't worry about them, but I need to install new feet to the new plinth for Garrard.
Many forum posts suggest to try a few different feet and see which works best for me. I may do that by myself in the future, but I am interested in what other people are using and what is best from their own experience.

I put my TT on a wood platform supported by Vibrapods and cones, which cost about $8 each. Its very effective. You can call the manufacturer and tell them what TT you have and they will set you up with the appropriate pods and cones (they have different levels of stiffness depending upon the weight of the gear to be supported).

09-12-12: Tbromgard
I put my TT on a wood platform supported by Vibrapods and cones, which cost about $8 each. Its very effective.

Me too! I'm listening to my TT sitting on Vibrapods and Cones as I write this. The cone-on-pod comes to $14 per unit (the isolator pucks are $6 ea), but I challenge you to find *any* footer that comes close to what these do anywhere near the price. They have a 30-day money back guarantee. Why spend more before you ascertain that you *need* more?

If you can't quite level your rack to use them, you can always place file cards under the pods until you get the platter level.

I went it even one better and placed the whole thing on a 3-1/2" thick maple butcher block cutting board with silicone gel pads underneath. Those extras helped, but the Vibrapod cones and isolators do the heavy lifting.