Best Isolation Devices?

WHAT ARE THE BEST ISOLATION DEVISES FOR COMPONENTS AND SPEAKERS? I AM USING AN ATLANTIS STAND WITH 2.5" BRASS CONES UNDER PREAMP AMP AND SPEAKERS(1 BRASS AND 2 STAINLESS STEEL). I AM USING TITANIUM CONES UNDER CDP AND BLACK DIAMOND RACING CONES #4 UNDER PREAMP POWER SUPPLY. I AM ALSO USING 1.5" BRASS CONES UNDER PS AUDIO P500. THE RESULTS ARE OK BUT I PROBABLY SPENT WAY TOO MUCH MONEY FOR THESE CONES. MY CURRENT SETUP WORKS O.K. BUT I'M CURIOUS ON OTHER PEOPLES EXPERIENCES AND OPINIONS. MY AMP IS A PASS X250, MY PREAMP IS A PASS X1, MY SPEAKERS ARE HALES T5'S AND I HAVE A PS AUDIO P500.MY POWER CORDS ARE GOOD BUT I HAVE NO IDEA WHAT THEY ARE BUT THEY ARE GOOD.CABLES FOR SPEAKERS ARE SHUNYATA LYRA AND INTERCONECTS EVERYWHERE ARE SHUNYATA ARIES. PLEASE HELP AS THIS TWEAKING THING CAN DRIVE ONE CRAZY. MY SETUP WORKS THOUGH. HOW MUCH SHOULD BRASS CONES COST? SOME ADS HAVE THEM GOING FOR $30 TO $450 PER SET OF THREE.