Turntable isolation platform Recommendations?

That kind of mass on a wall shelf can be bad news. Walls flex also actually, worse than floors because they are much thinner. Hang that kind of mass on a lever arm and you get a very springy affair. 
As whart implies, mass is not isolation when it comes to low frequencies.
It is a shame to have to put that beautiful table on an ugly MinusK platform. I would sink the MinusK into a cabinet so only the upper surface was visible. Anyway, this is life with turntables.
@whart , Look at the Schroder LT tonearm. Just a thought if you wanted to get rid of the compressor. If you are ever up in New England I'd be happy to demonstrate Sound Labs for you. But, judging from your room and taste in gear I'm not sure they are the speaker for you. 

Thanks, mijostyn. I learned to listen on stats. I'd love listening to a big pair.  Getting me to come back to the NE is a whole other question, but I used to love autumn  in New England. Gorgeous- the Adirondacks, Maine, Vermont, all of it. Used to drive competitive sports cars non-competitively -- that was one of my other passions for many years-- just a few days on the B roads with obligatory stops for coffee, cigarette breaks (stopped smoking) and the occasional query from the local constabulary. What a beautiful part of the world that can be. 

You obviously have had the experience. We tolerate the crap weather we get the rest of the year just for Autumn, the finest weather with technicolor. I live in Southern NH. My brother has a condo at Saddle Back mountain in Main. I drive a 911 C4S year round. Maine only has enough money to afford State Troupers on the major highways. There are thousands of miles of two lane back roads ( B roads) that are unprotected except for the local constabulary in the small towns. You just have to slow down when the speed limit drops before these towns. Other than that it is....open season:-) Catching air, lurid slides, big fun. Very little traffic. I use to autocross but it was taking up too much time and money. I stopped when the kids came along. 

@whart , forgot to put your label on the post above.

I'd love to go for a drive.