Difficult to answer the winter wheels question. It really depends on your usage and how important it is for you to be mobile 24/7.Haha. Yes, plenty of burnouts in the local maccy d's car park!
Still have a few mm but MPSS it is then. Have been debating whether it'd be worth getting a winter set but seems pointless for those handful of days we get a sprinkle of snow. Managed fine in my E46 for over 10 years.