I have been through many tires on my Volvos and I must say, Kumho makes the best tire for the money.
I had the KH16's on my 850, and they were killer! Very quiet, wore well (until one tie rod got some play in it and I neglected to fix it).
I now have the Ecsta LX Platinums on both Volvos in my sig and they are probably the best tire I have ridden on. Very very quiet, and they just seem to last forever.