Your options are either to buy non staggered RFT snow tires. Buy entirely new wheels and snow tires. Buy a second hand wheel for a spare tire and put it in the trunk.
I dont think you can fit 17's with the large brakes in the front (unless tire rack says you can).
Performance should not be an issue, but remember, snow tires handle like garbage in the dry conditions and wet conditions when there is no snow, it's like driving on a sponge. Trust me I've driven on snow tires for about 5 seasons now.