You'll have better selection if you wait a few months. Tirerack and other places like that don't stock up until the fall.

Blizzaks are fine, however, different models have differnt offerings so you'll need to figure out what you need.

Steel wheels.....I'm not sure they make them big enough, largest I've ever seen are 16in, but that was a while ago and frankly I don't keep up with steel wheels. I'd would just buy an inexpensive set of alloys.