I would say 215 45 17 or 205 50 17. Depend on where you are you can decide on the model of tire. Go to tirerack.com and look under survey. You can go dedicated winters but if you don't get much snow then a vg all season is ok IMO. I am going with either Michelin X-Ice or Nokian Hakka as I am in western Canada.
215/45/17 is a good balance of tire width and sidewall height. For dedicated snows (not performance) -- Michelin X-ice3, Blizzak WS70/80, Nokian Hakka's = $$$. General Altimax Artics and Hankook iPikes = $. All are tried and true.