I've been running the Nokian WR N0 on the stock 19" wheels this winter. These are on the 'approved' list from Porsche. They are officially all-season, but they have the extreme weather "snowflake in the mountain" symbol.

Bottom line: they are great. I don't feel any squirm, they grip pretty well in the cold and dry or wet, and work really well in the snow. And because they are all seasons, I'm not worried about them falling apart like winter tires if I get a little heat into them

My car is a DD and needs to make it home in the cold/wet/snow. I've had zero issues taking the turbo out in the snow.