07 BMW Z4 3.0si, NO sport package. Website claims its 225/45/17.
Suggestions please.

Have never driven a RWD roadster in the snow before, but on the other hand Toronto does not have too many bad snow days and I don't want to ruin the dry handling. So I am torn between the H/V rated high-po winters and the more conservative Q/T choices.
The TSX wears H rated WinterSport M3s which seem to strike a good balance but its a different car.