Vibration isolation

Looking for feedback.  I have a very resolving system with Synergistic Research Atmosphere Level 4 IC's and SC and all Elemental Tungsten power cords....McIntosh 601 Monoblocks, MCIntosh C2300 Tube pre, Lumin A-1 streamer with upgraded Kenneth Lau Silver Edition Power Supply all on 3" solid Maple stands / rack.  All this drives a pair of Sonus Faber Guarneri Evolutions mated to a pair of REL G-2 subs.  I have been experimenting with different vibration / isolation control from Herbies soft feet to Rollerblocks to VooDoo Iso Blocks
as well as Synergistic Research MIG 2.0's.  I've discovered that with most of the "bearing" type systems, while I like the pin point accuracy and detail, they make to system so bright that I can't listen to it....and my gear isn't typically associated with "brightness".   The VooDoo Iso Pods are the least bright with the MIG 2.0's falling in between.  The best sounding, detailed but not teeth grinding bright appear to be the Herbies soft feet.  They also seem to produce a soundstage with more body, highly detailed without the ringing brightness.  Results seem really odd to me with much that I've read.  Has anyone else had these sorts of results?  I'm really pretty stunned....my listening room is acoustically treated by GIK, so that's not the issue....would appreciate any feedback.
Thanks!