I did a search and didn't find any previous threads. I've read posts on snow tires, but I haven't seen anything on snow chains. According to the manual, the A5 can use them. Here's the issue. I live in Arizona but am about to travel to northern Utah for the holidays and anticipate snow covered passes. Purchasing snow tires at this point isn't an option. Does anyone have any advice on snow chains? I'm looking for something to get me over the passes if chains are required without taking a big chunk of $$$ out of my wallet. Since my use of these will be minimal, I'm looking for the "safe", economical chain. Help...