That is an incorrect question. The correct question is, with all the advances in snow tires, does my daughter need a summer/all-season tire? To that question, I would say no. Buy a set of Michelin X-Ice 3 tires and run them all year. In my opinion, they are a true all-season tire. Not the best on snow, but they don't melt (too fast) in the summer. Buy them from Costco ($70 off a set of four right now) or Discount -- they are the two best tire shops in the area. A set of the Michelins run year round is good for about 30,000 miles, but you don't have to worry about storing or changing tires, which is one less thing for a college student to deal with. If you want to the best of the best for a pure snow, Blizzak or Hakkapelitta. If you want the cheapest snows you can get, the Hankook iPike's (ripoff of an old Nokian) are good but loud, particularly when studded, and the new Yokahama's are getting decent reviews.
@Muleski's suggestion to run dedicated summer/winter tires on dedicated wheels is the correct way to go, but not the only way. I've noticed that most people who buy Blizzaks have very little experience with other tires because once they buy a set they just keep buying more.
In my slightly extended family, we have one Outback on the Hankooks, two Outbacks and one Suburban on the Michelins. All the Michelins are run year-round. The Michelins are better than the Hankooks on dry, wet, and ice. The Hankooks are better in deep snow, slush, windslab, and when studded better on snow or slush over ice. I think the Michelins are crap in slush.
If your daughter is going to school at DU, the Discount Tire on Colorado Boulevard will take care of her. They don't carry Nokian. For those you have to go to Meadow Creek Tire. If she is at CU Health Science (Anschutz), the Costco on Havana is best.
At the risk of sounding overly dramatic, if you are concerned about your daughter's safety and wellbeing enough to put her in a Subaru, just put good snows on it and don't think twice. From personal experience, because of way the Subaru AWD system works on automatic transmission cars, they can be occasionally terrifying in winter conditions without good snow tires when the AWD system freaks out and suddenly shifts power around. I would bet good money that is what happened to the driver of every upsidedown Subaru in the ditch on I-70. Manual transmission Subarus have a 50/50 torque split and are much more predictable.