I'm far from being a badge snob but I wouldn't use Nankangs.
In my view these winter tyres will likely be on the car about 5 months per year, Nov - March and are likely to be in use a few winter seasons, therefore some initial outlay for a branded make in my mind makes perfect sense.
When doing some research last year the Conti/Dunlop/Goodyear/Pirelli/Michelin/Vred winter stuff seemed a lot better in terms of how they perform versus the budget gear.
Obviously each to their own, but I wouldn't use Nankangs in any circumstance so for me I never even looked at them for winter use.