I just picked up a set of Kumho I'zen stud snow tires (kw11) for my girlfriends Avenger. Haven't really driven in the snow with them yet but they were pretty good on dry roads when I took it for a spin... they can't compare to here summer tires just based on the different wheel sized (summer's are on stock 17's 215 wide, snow's are on 14" steelies and 195 wide)
I parked next to a guy at work yesterday that just put some blizzaks on his Z4 (what an ass for driving that thing in the winter in MN) and I was comparing the two tires and they seem pretty damn similar as far as tread design and rubber compound
I'd stay away from the hankook, haven't ever heard much good about them and they are supposed to still be making the "old school" snow tires. where as blizzak, kumho, dunlop, michelin are all using "hydrophilic" rubber compounds to help with snow and ice traction
I paid about $225 for the kumho's from discount tire direct
good luck