It seems Cooper also makes the AT3 in 255/70R18 (~32in, but less wide, so hopefully less chance of rubbing).
I had 255/60R18 Grabber AT2s, and they rubbed a bit on full lock when I first got them.
I've heard lots of positive reviews of the new AT3s, but I've also heard similar sentiments to Trac Marks; however, those sentiments were usually talking about the older STTs and STs. The AT3s are supposedly all new, etc., so maybe they'll hold up better. Just do your research, read and read some more. I was thinking of getting some AT3s for my lil Subie, but after thinking it over, I'll probably just get the AT2s again. They were a bit loud, but they worked really well in lots of conditions.