Had second thoughts

Got a bit concerned last night when thinking about the impending purchase. I was aware that obviously a RWD car is not going to handle as well in winter as a FWD or AWD vehicle. However, I never really thought how big of a part tires played in that. So after doing a bit of research, I saw that a lot of G35 owners purchase a set of winter wheels. The cost could be anywhere from 800 - 1500 bucks, but it improves winter performance immensely, from what I've read. I'd rather do that than have to drive some beater around all winter...