Try a Sistrum SP-3 or 4. Call Robert at audiopoints.com. I have his SP-101 stands under my VAC 220 Monoblocks and love what they did to the sound; it cleared up the noise and increased the resolution. Robert recommended audio points under my VAC 2.0 PHI preamp so I tried them too and was absolutely amazed how much better every thing sounded. Money back guarantee doesn't hurt either.
What's under your amp?
Interested in hearing the importance (or not) of isolation platforms for amps. Check my system, you'll see I've got my Cary's sitting on top of my cabinet, which is a custom piece made of solid cherry. Very solid, but I'm wondering if maybe the cabinet is introducing vibrations up into the amps, and maybe I could use some help from a platform?