In the same All-Terrain category as those SilentArmors vaporware, Pirelli very recently came out with a Scorpion ATR sized 255/55R19, the tread looks a tad less aggressive, but unlike the Wranglers they are available now.
![Wink :wink: :wink:](/styles/default/xenforo/smilies/wink.gif)
If you are just looking for grippy tires to negotiate snowy and icy roads, and not necessarily to take your LR3 off road, dedicated winter tires such as the Pirelli Ice & Snow (same size) may actually do a better job than either ATs above, IMHO. TireRack lists both, check them out. Someone over on rr.net (with a RRS) has ordered the 19" Pirelli ATRs and will report back on how he likes them soon.