If you can live with them, go with some used 15" Taurus wheels. You will save big money on the wheels AND the tires. A quick look at tire rack shows about $100 for 15" Blizzaks and nearly $160 for 17". Plus I prefer more sidewall in a winter tire.
The Blizzaks I had on my 03 Cobra were great. Apples and oranges cars I know, but the Firestone Winterforce on my 02 Focus don't provide the same level of confidence (and grab terrible on roads that are ground/sliced for water runoff).