I would save the money from the power cables and use the Nobsound, and if you do not have your speakers isolated and your turntable then add Nobsound to them too.
You can buy from amazon and if you do not like them send them back. BTW,I have nothing to do with Nobsound beyond that they work so I bought many of them.
If you want to verify on your own, and have an iPhone use Vibration analysis it is the closest to an actual vibrometer you can get without a real one, and it is very good.
Whatever you do, I hope you enjoy your system better.
I am in the USA this week so I can send you the actual LDV numbers but here is