Wheel/tire options for non-sport X-5 4.8, 2007

[Jeff SJ]

Now that my X-5 is spending a fair amount of time in the snow of Park City, Utah, I'm looking into winter tire options. May go with a fairly aggressive all-season tire or maybe snow tires for the stock 18's. I'd like to upgrade to 19's or 20's for the summer and that way keep the 18's in their winter tires, just swap wheels instead when the season's change or when I'm in Socal for an extended time.

What options work with a non-sport pkg X5? 19s, 20s or both. Tire options(sizes). Pictures would help as well. I'm probably getting the stock wheels or replicas to match the stock look.

With regards to winter tires, recommendations? I am aware what tirerack has, wonder if any other less expensive options exist.

Jeff