What about Toyo Open Country G-02 Plus?
I don't know much about the Pirellis, but you can't go wrong with the Blizzaks. Just to complicate matters though, I am going to suggest a third option.
After some research of my own, I found that the Toyo Open Country G-02 Plus also have excellent ratings for snow and ice traction, but have better treadwear rating than the Blizzaks. Also called a few local tire shops that carry all the major brands and the guys I spoke with at each shop recommended the Toyos over the Blizzaks hands down. They said Toyos just as good, but last longer. In fact, 2 of 3 guys had G-02s on their own vehicles. The other had Michelin x-ice, but also insisted that the Toyo's are a great tire.
You can start with 1010tires.com for online reviews, but also suggest you call some local shops that carry all 3 brands and get their opinion. (make sure you ask if they have all in stock 1st, otherwise it could bias their answer).
I have a set of Toyos sitting on some alloy wheels in my garage desperately awaiting my 09 HL to arrive!