What would give the best overall improvement

Stringreen,
I have found something better than the eden sound products . I was running the terra cone footers with the brass adjusters on my SSC.

I bought Amcan footers (http://www.amcanaudio.com/)I put a large set on my Superscoutmaster along with the spiked adjusters and a set of medium without the spike adjusters on the motor, making both the TT and motor level in height. These blew away the terra cone footers, which I sold.

The Ancam product comes in stainless steel, brass and copper, all giving a different sound. I have no affiliation with the compny, just want to pass along a tip to fellow audiophiles.

Stringreen did I not recommend the aluminum over the acrylic platter?

I have been considering new "feet" but there are so many options. I think a better outlay of cash at this time might be to stabilize my rack.

It's a VTI modular system, not really high ended at all. I have about 6 stacked units now with the TT on top. While I get seemingly zero vibration through the rack, at least nothing I can readily notice, there is a slight oscillation of the rack if you push at the top. I think I want to try bracing the rack to the wall.

The best bet would be to buy a multi level rack, but due to space limitations it needs to be "tower" like in its modularity.

Well, it seems there are no SDS controllers to be found. They are all out of stock!

Moonguy....I found that Terra Stones are not as good as my Bearpaws when used with my Superscout/rim drive. HOWEVER... what I DID find was that the Terra Stones in the front corners of my room did wonders with some room resonance I had. (discovered that by accident after ordering and trying the then useless Terra Stones)