I've ran the xtream MTs and ATs and they both suck. Just poor quality. They wear bad, take too much weight to balance and don't last. And with the ATs I would just about get stuck in wet grass. They don't clean worth a damn either. Stay away at all cost IMO but that is just my experience.
Wow those look great! Very nice choice. Sadly my tires are about gone now, almost got stuck in wet grass the other day. haha I'm thinking about going with some km2s for the new ones.