Winter Tires: I have used many brands of winter tires, they are all hugely superior to summer tires, or to the old "snow tires" that were widely sold.
With a 30 mile daily interstate commute, a veteran of 35 years of mountain ski trips....
Beware of sheet ice: twice nothing (traction) is still terrifying.
Interstate snowpack: Ice tires make it seem like maybe a gravel road, while the cars around you are sliding around wildly.
Sleet: wow, you will love this!! While hard summer tires think this stuff is ice, the true ice tires see the gritty finish and convert it to almost concrete!! A long hill into the parking lot at a major ski area had lots of 4wd vehicles sliding back down, sleet was pelting us at the time. Our trusty RWD wagon (well balanced, 4 cyl up front, luggage in the back) stopped half way up the hill to let an Explorer back down, then we started out crisply and proceeded up the hill to the lot. A couple of the more curious (better students) 4wd owners came to inspect the tires used!!!
Currently using (2008 Corolla commuter car) Michelin Xi2's, Consumers Reports and Tire Racks tire test winner.
For those wishing to pay much less, I suspect the Firestones will still amaze you!!!