Stankia

What I always do is get an aftermarket set of nice wheels for the summer and run whatever the top tire is at the moment, which usually is Michelin Pilot Sport. For the winter I get Winter tires (Michelin Pilot Alpin or Bridgestone Blizzak) and put them on my stock wheels. Since you're leasing and don't want to get another set of wheels just use your stock wheels for the summer and winter tires. All season tires are fine for soccer moms and their mini vans but a car of this caliber would be better off with dedicated summer/winter sets.