I would normally say to get a set of 17 inch rims and mount snow tires on them, especially in a region where you expect snow fall every year. Since you're leasing though, it makes it a harder choice if you don't plan on buying out the lease. It might be worth getting a set of 17 inch or 18 inch rims with dual bolt patterns and using them to mount snow tires. Most asian SUVs use either 5x120 or 5x114.3 bolt patterns and inexpensive rims are available with that dual pattern. Tire size is usually pretty close within the vehicle classes so you'd probably be able to reuse the tires too.