I too have the Michelin 19.5 xds M&S's. Mentally, I have learned to sing along with them. I am used to it now, and it helps me to ignore the voices. :B It did take me a while to get used to the singing tires, but I am okay with it now. The singing tires never bothered my wife at all.
I have never felt any wandering at all. I have experimented with air pressure, from 70 to 120 psi. With the TC loaded, I really could not tell any difference by the seat of my pants. Empty, at 120 it was like riding on a ping pong ball. Typically I run about 85 psi, loaded or empty.
I have had my tires for about seven years.