Clio09
Ayre is one company that double insulates its equipment chassis. Charles Hansen has posted numerous times on Audio Asylum his views on ground noise.
Yup. Sadly, the Ayres are rather far and few between.
I also have lifted the grounds off the three prong cords by disconnecting the ground wire altogether, except the one for my power amp.
Not a good idea from a safety point of view.
First it assumes that the interconnected chassis have their signal reference grounds tied to the chassis through a low impedance path. Second, it assumes that the interconnects and circuit board traces are all sufficient to carry the fault current in the event of one of the chassis going hot.