Turntable isolation platform Recommendations?

Deferent level of something, for sure.

@chakster ,in no way can you compare studio or commercial equipment with consumer Hi Fi. The environments are totally different. There is no bass under 50 Hz in FM broadcasting. As for mastering, at the point the master is sent to the lath there is no music in the room. If anyone is listening it will be via headphones. These lathes can be far from perfect. I have some records the rumble is intolerable, bad lathe. The lathes are big, very heavy and complicated devices. They are far from perfect.
In terms of high quality reproduction in residential situations it is difficult to argue against suspending a turntable. If done correctly the result is a far more stable device with a much lower "noise of all kinds" floor. Any user of a suspended Sota, SME or Basis turntable will wholeheartedly verify this. he AR XA was such a landmark because with a little clever thinking and design it handily out performed  all the commercial tables of the day.
So much so that others like Thorens and Linn  started copying it and idler wheel tables disappeared. Look at the current crop of ultra expensive turntables, the Basis Work of Art, the Air Force One, the Dohmann Helix.
All of them are suspended in some fashion. 

As for cheap isolation platforms, the Townsend looks to be OK. It is a plate sitting on 4 damped springs. Because it is sitting on the springs and not hanging from them it will have a tendency to be unstable particularly with a heavy load as there is nothing to keep the springs from moving laterally. A hanging suspension will always bob straight up and down. This type has a tendency to bob all over the place. Just ask anyone who has owned a Linn.

Short of an active anti-vibration platform, the most effective at isolating things from external vibration and killing self generated vibration is something like the MinusK platforms.  These are used in industry and laboratories.  They are also used under turntables, with some very expensive tables actually being built to work with their platforms (e.g., Swedish Audio Technology's turntable).

Where do you buy SRA platforms. I emailed the company a couple days ago, but haven’t gotten a response.