Bridgestone WS60/70.
Who the hell gave you a quote for that much? WTF LOL.
http://www.tirerack.com/tires/TireSe...r=Base%20Model
Not a single set costs over $900. Just get the WS70's if you get a lot of icy roads, if it's just snow that blows over and you're left with dry roads then get the Michelin Pilot Alpin PA3's (but then again I ran those on my xDrive with the crazy ice we get over here and they were excellent).
Stay away from Pirelli for winter tires, not just cos of the price you got quoted but in general experience.
/thread.