Which Herbie's Product is Best?


Herbie's has several products which are targeted at isolation from vibrations. In your experience, what works better, the Tenderfeet or the Isocups with balls? Which of the balls do you recommend most? How do they compare to brass cones?
ait
In my case, Steve recommended Tenderfeet for my transport and DAC, and Iso Cups for my Pre and Amp - I think it was an SS versus tube consideration.
Thanks for all the advice! I just ordered 4 Tenderfeet for my CD/HD player and 6 Isocups with lampblack balls for my preamp and preamp power supply.
Tenderfeet under my CDP and Iso-Cups w/ the previously available Ruby balls (3) under my integrated amp and Big Dots under my speakers. Steve has to steer me wrong with isolation recomendations. I also have used the Excellent Mat on an LP12 with outstanding results.
I use Iso cup/balls. I also believe in using 3 but on my 55 pound CDP I didn't have confidence that something bad might happen so I went for 4 for added stability. Tendefeet were too bright/brash in the HF on my CDP.

ET