My opinion: go with Avon Tech M550s. They are better than any other all season tire I've ever used, which includes numerous Michelins (MXV4s, MX4s), Yokohama (the tC's stock S32As), Continental (Contitouring Extreme), various Bridgestone Potenzas (RE092s, RE95s and others) and Goodyear Eagle LS.
-Ed
-Ed