225/60/17 for winter is the way to go. You don't want any wider than 225. Remember it is for winter, tires need to be less wide so it can cut through the snow.... Wide = snowboard ...
In regards to winter tires, get the ones that has real winter rubber compound all throughout the entire tire thread. Some snow tires only had winter rubber compound on the first few mm's thread depth and once the tire gets more mileage, the all season rubber compound shows up halfway of the tires life.
I believe Nokian has full winter rubber compound all through the life of the tire.
I believe some winter tires manuf. are also making this kind of winter tires nowadays. Just do some research... Also, check for better rolling resistance for fuel mileage and less wear.