Hi Kent,
I went with 6 Large black dots per speaker, one in each corner and two in the center. This is probably a little overkill, but with the CH's sitting right on top of the DH's I wanted all the decoupling I could get. If you go with the Von Schweikert (sp?) special you should be OK. Steve is a good guy, fire him off an email and he will recommend what he thinks is sufficient, and there is a 90 day refund to boot.
As far as the physics of it all, my two meters left ear and right ear, tell me these things really work well. I was initially going to go with a couple of Symposium Svelte Shelves, but got turned off with the cost.
I haven't upgraded to the Alnico's as of yet. All of my gear has been on the looooong burn-in due to the mods done over the last couple of months. Too many things to mention, but think of Blake Gates for a start. When things calm down a bit I'll look into possably going with the Alnico's.
Chris