I have been using one of Barry Kohan's Bright Star Gemini isolation platforms under my VPI TNT for the last four+ years. It has been an excellent performer. My room is not an easy one from an isolation standpoint, as I have a full range, high-powered system in a room with a suspended wood floor and a DIY rack that does not itself provide much in the way of isolation. (I'm working on the rack part.)
I had significant feedback problems with my analog rig before I installed the Bright Star Gemini isolation base. The Gemini isolation base seemingly cured all the noise feedback problems, and I have been content with the Bright Star base ever since. (Unfortunately, however, I will have to move on to a new base whenever I finally decide to pull the trigger on upgrading my TNT to include the flywheel, as that will cause me to outgrow my current base.)
I am also using the Silent Running Audio custom isolation bases under my amps, and I am VERY impressed with their performance. So I would put in a vote of confidence for the SRA products as well.
I had significant feedback problems with my analog rig before I installed the Bright Star Gemini isolation base. The Gemini isolation base seemingly cured all the noise feedback problems, and I have been content with the Bright Star base ever since. (Unfortunately, however, I will have to move on to a new base whenever I finally decide to pull the trigger on upgrading my TNT to include the flywheel, as that will cause me to outgrow my current base.)
I am also using the Silent Running Audio custom isolation bases under my amps, and I am VERY impressed with their performance. So I would put in a vote of confidence for the SRA products as well.