Many of us here won't drive the XF in the snow - so reviews of how tires do in the snow aren't always easy to find .... but many here DO drive all year around and have indicated what tires they like.

I went with Hankook V12s and LOVE THEM - but I don't drive in the snow. I can't remember what was said about them in the snow, but they are quiet and the car drives like it's on RAILS now!

Go read threads in the "Tires and Suspension" area here and see what comments and advice you find.

I also think the advice about getting two front rims and mounting a "winter set" of tires is a very good idea!!!