I'm also a big fan of Michelin tires, love the Pilot Sport AS/3+, but it is only available for the 20" size.
In the 19" size I'd recommend the Continental DSW 06 (had that on a VW Jetta Sportwagon several years ago). Maybe better is the Goodyear Exhilarate which is relatively new but seems to have good reviews.
BTW: living in San Diego snow experience is extremely limited... Of course you'd prefer real winter tires in areas where there is a lot of snow.