Here is my MOST (Molten Orange ST) with its snow tire set-up from Tire Rack. Wheels are 15" steel with 185/60 R15 Michelin X-Ice Xi3 XL's. This is W/O the hubcaps obviously...
and here it is with the caps. I went with the KT-915 style. All up, the order was $888.00. That includes the tires, wheels, hub caps, balancing, mounting, the TPMS sensors (mounted), the lug nuts, shipping and the Ford doohickey to get the new sensors to talk to the car. Not cheap, but since no one makes a 17" 40 series snow tire (and the roads here look like they have been cluster bombed so I want to save the AL wheels for summer), new wheels were necessary.