Try Star Sound's Audio Points. My experience with different cones and points is limited, but some claim them to be the best and the improvements in my system were very, very good when I put audio points under everything. The geometry is such that it pulls apart the carpeting to get to the underlayment.
Keep in mind that they (and perhaps others) require an initial 4 to 8 day mechanical break-in period. Yes, it's true.
And if you should move your equipment around again, it can take another fews day for proper re-settling to complete.
-IMO