What isolation feet under your amp with great result?

Mechanical drainage of micro vibrations makes a tremendous difference, in a positive manner, on the total sound quality.  It's really amazing how much improvement a quality footer can provide.  Sorbothane was popular in the 1980s and is still being used today.  However, it is now considered very entry level for footers and actually is not a good solution if your looking to improve on dynamics, clarity, and tight bass.  Sorbothane detracts from all of those characteristics.  I use Symposium Acoustics Rollerblock Jr + (the + means the upgraded balls to tungsten carbide).  They work best when used in conjunction with the proper platform.  I use the Symposium Acoustics Ultra platforms.  Great product, not cheap but also not the most expensive on the market.  Do your research and make the choice you are most comfortable with.  As long as you land on a high grade product, with proven results, you will be well rewarded. 

three easy payments, I believe that ebm is describing to use the Critical Mass Center Stage as footers under the amp and, thus, between the amp and the Ultra Stealth platform.  That is the same method that I had described in the page 1 of this thread except I use the same brand (Symposium Acoustics) Rollerblock Jr + footers.  They are less expensive than the Center Stage footers and, IMO, provide excellent vibration drainage from the amp and directly into the Ultra platform.  You can contact Symposium Acoustics directly, speak with Peter (the owner) and he will provide excellent information and help to you.
Good luck.  Be safe and be healthy.