I never drove any of my high performance cars in the winter. The Porsche could have been driven in the winter with the proper tires, but the reason it got stored was the continuous paint damage from the rocks that Edmonton slathers the road with.
I think my older Forester is the ideal winter vehicle. Light (<3200lbs), lots of ground clearance but still low CG thanks to the boxer engine, and AWD. Chris' comments about light weight are spot on. Massive vehicles have a ton of momentum and long stopping distances, even on good snow tires.
Regardless of FWD, RWD, AWD, or vehicle type, snow tires are the only way to go. See my thread on the Seattle folks in AWD vehicles going nowhere thanks to poor tires...