I would definitely advise getting a separate set of wheels with winter tires. Save some abuse on the nice wheels and save money by not constantly switching. I have 2 sets for both my cars and I love swapping back and forth not having to deal with tire places that often is nice.
2003 Ford Focus ZX3("FUBARCUS" was "Brokus") - old and still busted
2007 Subaru Impreza 2.5i - current DD