For a foot design that would combine vibration transfer with absorption and isolation at a reasonable price, I'd go with Vibrapod Cones sitting atop the appropriate weight-rated Vibrapod Isolators. Everybody who sells them offers a 30-day money back guarantee, and they're very light weight, so if you returned them shipping would be very cheap.
Another thought would be brass spikes/cones sitting on Herbie's Grounding Base.
Either of these approaches combines the vibration transfer of a hard ball or cone with a soft receiver to dissipate the vibration, and also to isolate the turntable a little bit from the room.
A third approach would be to use spikes or cones onto a butcher block cutting board, and then something soft under the cutting board, such as silicon gel pads, Vibrapods, or Foculpods. This combines vibration transfer out of the base and into the cutting board with isolation underneath to isolate the TT from in-room vibrations and feedback.
Another thought would be brass spikes/cones sitting on Herbie's Grounding Base.
Either of these approaches combines the vibration transfer of a hard ball or cone with a soft receiver to dissipate the vibration, and also to isolate the turntable a little bit from the room.
A third approach would be to use spikes or cones onto a butcher block cutting board, and then something soft under the cutting board, such as silicon gel pads, Vibrapods, or Foculpods. This combines vibration transfer out of the base and into the cutting board with isolation underneath to isolate the TT from in-room vibrations and feedback.