I have a set of nokian WR g2 on 18" wheels that I run in the winter in pdx. They are full blown snow tires and the performance on dry pavement is marginal at best. It does make me drive slower however. A friend of mine runs the Michelin Alpin winter tire on his M3 and loves it. He says the ride is actually better than the PS2. If I were you since you have a jeep I would get a set of hi performance winter tires instead of full blown snow tires. The easiest would be to get factory sizes that fir your stock rims, unless you want a 2nd set of wheels. Do you have 18 or 19" wheels?
I believe these fits the 18" wheels.